After a fanfare arrival on the consumer electronics market, connected bracelets and watches now seem less to the front of the stage.However, the sector is still experiencing good two -digit growth.For connected watches, it is Apple that largely dominates the debates with a market share that is around 51.4 % for the first half 2020.During this period, and despite the pandemic, sales of connected watches have significantly increased to reach the excellent figure of 42 million units, an increase of about twenty % compared to the first half of 2019.

Today, the market has reached a certain maturation with various models capable of meeting all needs and budgets.Without forgetting the question of design: the different actors offer sophisticated watches and bracelets, others with a more sporty look while we find references unequivocal a more feminine card.

We offer you in the guide which follows a selection of our favorite models before approaching the essential questions to ask the time of choice came.

And for those looking for a watch for sport, we have created a dedicated selection here.

Connected watches and bracelets: the latest news in early 2021, we were waiting for the release of the first connected watch from the One Plus brand, announced at the end of 2020.In the spring of 2021, the OnePlus Watch was finally available for sale at a price of € 185 on Amazon.It benefits in particular from a nice design and exceptional autonomy (2 weeks according to the brand).To find out more about this new connected watch, go to our OnePlus Watch test.It is a few months after the American market that the Samsung Galaxy Watch 3 and Watch Active 2 connected watches find their full potential in France (and in 30 other European countries by the way).Indeed, these two models now offer improved health monitoring since it takes into account the measures of blood pressure and the electrocardiogram.Everything goes through the Health Monitor application.Blood pressure control can prevent heart or cerebral concern.The update was deployed in the spring of 2021.At the beginning of summer 2021, Fitbit returned to the market with luxury fitbit.Available from € 149.99, it offers an elegant design and a range of refined accessories.It focuses on well-being and offers follow-up of activities and effective sleep despite some inaccuracies.To find out more about this model, go to our luxury fitbit test.We are also waiting for the upcoming release of the Fitbit Charge 5 announced last August.According to Snoopytech, it will be available from 179 € and will take up the main characteristics of load 4, but with a color screen and an ECG sensor, a real novelty that is not even present in Fitbit.While waiting to discover our test of this new connected bracelet, you can consult our article on the functionalities of the Fitbit Charge 5.

What are the best connected watches and bracelets?

Apple Watch Series 6 GPS + Cellular

We like manufacturing quality ✅ Very successful screen✅ General ergonomics✅ Fluidity✅ Simplicity of Useon does not like a watch reserved for iPhone❌ autonomy users that does not progress ❌ The price of accessories and certain options

Launched last September, the Apple Watch Series 6 is certainly not a revolution, but it brings its share of novelties, especially around health.

From the outside, nothing changes at least when it is at least worn.We find the 1.78 inch rectangular OLED screen, the large rotary hemmed button in red on the 4G versions and the boxes offered in different materials, this choice imposing strong climbs of the final price.Aluminum, stainless and titanium steel are available ... all in two sizes, 40 or 44 mm.By removing the watch and turning it over, we notice new on the sensors with the arrival of red LEDs in addition to the green LEDs.Indeed, the new Apple Watch now has in addition to the cardiac frequency sensor with an oximeter that will measure the oxygen level in the blood.A data used in particular by athletes and which arises in addition to the measurement of heart rate to detect certain anomalies.

The Apple Watch Series 6 hides a new bicœur processor, the S6, presented by Apple as 20 % faster than its predecessor.We also find the W3 radio chip which takes care of wireless connectivity.It is supplemented by the U1 chip which offers a very short distance connection which could transform the watch for example into a digital key to open future BMW.Of course, new features are inherent in the arrival of version 7 of Watchos.We think in particular of the greatest personalization possibilities or the introduction of additional practices in the monitoring of activities.

Apple Watch is

We like quality / price ratio be nice screen ✅ fluidity we don't like always display on omone iphone❌ no u1 chip

With this new version of its Watch, Apple is remaking us (as a master?) That with its famous iPhone, which is a huge commercial success.The idea of the Watch is to start from the base of the previous generation, the Watch Series 5 and to offer it at an aggressive price ... for an Apple product.The result does not give access to the functions of the Watch Series 6 and even ignores certain options of the Watch Series 5.In the end, we keep a model with proven design, under Watchos, and especially at an attractive price.A good way to equip yourself, unless you should prefer Watch Series 3 to this Watch is.

Withings Scanwatch 38 mm

French elegance

We like Élégant Design✅ Manufacturing quality✅ richness of health and well-being measures ✅ general ergonomics very successful✅ well thought-out ✅ autonomy does not like "connected" functions back

With his scanwatch, French Withings achieves an almost flawless course.Its watch is one of the few to accommodate small wrists in its 38 mm version.It presents a licked design and can be similar to an elegant traditional watch when it is seen a few meters away.Note that it also exists in 42 mm as well as in two colors, silver or black.The brand also offers a multitude of fluoroelastomeric, leather or metal bracelets.The case is made of lacquered brass and its rigorous assembly allows it to display a 5 ATM waterproofing.

Despite its compactness and discretion, it is also one of the most complete in terms of measures and data monitoring with a healthier / well -being axis than resolutely sporting.She is thus able to follow your heart muscle very closely.The withings scanwatch can thus report irregular beats or even display your heart rate.Respiratory disturbances are also under control with for example the measurement of oxygen saturation.The Health Mate application is complete and intuitive as well as manipulation of the watch.The small screen is very simply handled with the rotary button of the watch which allows you to scroll.The icing on the cake, the scanwatch enjoys excellent autonomy with more than two weeks without recharge in sustained use with several weekly sports sessions.

Huawei Watch GT2 Pro

We like manufacturing quality✅ Huge autonomy✅ Design✅ comfort✅ specific sensors and manyon does not like some functions absent on iPhone❌ monitoring of unprecise

With the pro version of its Watch GT2 Huawei still goes upmarket, because this new version is built around a titanium case whose qualities of resistance no longer boosts.To go even further, the large 1.39 -inch circular screen which is based on an AMOLED touch slab with a definition of 454 x 454 pixels is protected by sapphire glass.The finishes are really at the top with two choices of bracelet: leather or rubber.It is up to you to choose.

In terms of operating system, Huawei offers us its homemade bone called Liteos.The idea is to offer a lowest possible system in the face of power limited hardware.And this is the case here.The interface reacts perfectly to all our requests.The menus are easy to understand and very quickly you will find yourself at home.The Huawei Watch GT2 Pro is not surprised to a depth of 50 meters.It hides many sensors, a GPS of course, but also a barometer, an altimeter, a gyroscope ... The heart rate reader has been very precise, more in any case than sleep tracking.With its controlled operating system and its processor also developed internally, the energy efficiency of this watch is exceptional.The big battery of 455 mAh ensures the Huawei Watch GT2 Pro an autonomy of at least a week.

Samsung Galaxy Watch 3

We like ✅ tizen OS✅ finish at the top✅ compatible Android and iOS✅ the return of the crown!

Available in two sizes (41 and 45 mm), the Samsung Galaxy Watch 3rd can therefore adapt to all the wrists and to all tastes thanks to the wide range of possible bracelets, because the watch accepts standard 22 mm models.This watch is based on the Tizen OS house operating system which improves from year to year to constitute today one of the bones for the most successful connected watch.This new version allows us to once again appreciate the presence of the rotary crown which allows you to very easily pilot a perfectly successful interface.She makes very practical notches feel when it comes to using without having his eyes riveted on her Samsung Galaxy Watch 3.

Another very appreciable point, the screen of course 1.4 inch Amoled is very readable with beautiful colors.In terms of sensor, the Samsung watch does not go as far as the Apple Watch 6.However, we find the essentials with a GPS chip, a gyroscope, an accelerometer, a barometer and of course a heart rate sensor.

Garmin Venu 2s

We like discreet and elegant design✅ Many health and well-being functions ✅ followed by complete physical activities ✅ beautiful screen✅ autonomyon does not like a little expensive ❌ user interface not so simple that

At Garmin, the connected watches came are located on the border between the generalist connected watch and the sports watch.It is this same philosophy that the American brand takes up for its second generation of the coming.The coming 2 ... But things are a little more complex than that, because Garmin chose for the new vintage to decline this family in three versions: come 2, come 2s and came 2SQ?We have chosen the 2S version which is closest to the original coming.It relies on a 40 mm box that accommodates a 1.1 inch circular screen with an amoled slab of 360 x 360 pixels.This elegant and discreet case is built in fiber reinforced polymer while the bezel is made of stainless steel.As for the screen it is placed under the protection of a Gorilla Glass 5 glass window from Corning.The whole is rather elegant with several choices of colors and bracelets.

In terms of features, it's full cardboard.Health monitoring is particularly advanced with functions like the Health Snapshot (health overview that measures your vital statistics in two minutes), followed by stress, monitoring of menstrual cycle, breathing, sleep, hydration ...Throw more!

The whole is quite easy to take in hand, but it however requires a little time to go around it.Of course, the 2sprend arrival in charge of more than 25 sports and even offers training led by coaches!If your bank supports the service, it is possible to pay directly via NFC with the watch.This is watertight to 5 ATM and can withstand a week of use without recharge.

Garmin Fénix 6

Along for the adventure

We like beefy! ✅ Autonomy✅ Full of functions✅ Ultra-Précison sensors does not like sometimes complex menus very close to the previous generation❌ Prix

Fénixs are the stars of the American brand Garmin.A real success story that has not been denied for years.We say the Fénix because for this new generation we are dealing with a real range of watches with three diameters (42, 47 and 51 mm), more materials (titanium, sapphire glass) and some technological differences such as the presence of solar recharge.Prices range from around 700 to 950 €.In all cases, the user will find in front of him an ultra-complete watch presented by Garmin as an outdoor model in the widest possible sense.

The Fénix 6 thus covers a very wide range of sport ranging from trail to golf through running, cycling and even swimming.A huge functional wealth that accompanies sport in its training, racing and recovery phases, a wealth that must be tamed.A few weeks of practice were necessary to master all the mynus of this watch.Autonomy varies enormously according to your use, but is nonetheless excellent with for example 16 hours of continuous use in GPS + Music mode on the Solar model.We find the classic design of this range which benefits from an ultra-silted finish.

Xiaomi Mi Smart Band 6

We like✅prix✅ Super screen✅ reassuring autonomy✅ Functional richness we don't like very classic design❌ Still no GPS chip

It has been several years now that Xiaomi offers with its Mi smart band the reference connected bracelets.Complete, customizable and almost unbeatable products.The new generation that logically takes the name of Mi Smart Band 6 is immediately distinguished by the size of its screen.Indeed, the one who always relies on an Amoled slab now displays a diagonal of 1.56 inch against 1.1 inch for the previous version.Its definition climbs to 152 x 486 pixels for a density of 326 ppi.The screen is perfectly readable including in the middle of the day under a beautiful sun.Its brightness which can reach 450 nits is undoubtedly not unrelated to this great comfort of use.With a larger screen, the Mi Smart Band 6 inevitably takes a bit of overweight, but with less than 13 g on the scale it is quickly forgotten.Its TPU bracelet ensures perfect outfit while being very comfortable.The bracelet has an interface perfectly suited to the screen format.Clear menus that allow access to many features.The Xiaomi Mi Smart Band 6 supports 30 sports activities, from running to kickboxing via bowling!Swimming does not scare him since he is waterproof to 50 ATM.Health -related functions are not to be outdone.The bracelet includes in particular for this a heart rate sensor.It also measures the quality of breathing during sleep.Autonomy is still as impressive: 14 days according to Xiaomi.

Amazfit Gtr 2

We like very attractive prices ✅ splendid oled screen ✅ very good autonomy✅ micro and integral HP does not like any ergonomic companion application❌ use and sometimes complex configuration ❌ we cannot answer notifications

Amazfit is a Chinese company that revolves around Xiaomi and which has been offering for a few years now a beautiful range of connected watches and bracelets that sometimes have trouble arriving to us.GTR 2 immediately impresses with its ultra competitive price with regard to its manufacturing quality and technical characteristics.The metal case accommodates a very beautiful 1.39 inch circular OLED screen.Its slab of a definition of 454 x 454 pixels is protected by a glass in Gorilla Glass 3 glass.The finishes impress and the bracelet can be changed very easily, because it is standard type.The owner system is probably not the most responsive that we have crossed, but it is rather stable and above all supports iOS and Android.For this you have to install the Zepp application which is not a model of intuitivity.Despite everything, we get used to it fairly quickly and we appreciate the advanced possibilities of this watch.It is thus possible to answer a call or even store 3 GB of music there before connecting a helmet to go running by leaving your smartphone at home.Of course, the Amazfit has its own GPS chip and supports a dozen activities.

Amazfit Band 5

We like ✅ Price ✅ Functional wealth✅ Alexa Integrated✅ Exceptional autonomy does not like GPS❌ design too close to that of his cousin

To say that the Amazfit Band 5 looks like the Xiaomi Mi Smart Band 5 rings as obvious as the two products placed side by side are like two drops of water.The two products can for example exchange without adaptation any their bracelet!The reason is simple: Xiaomi connected bracelets are made by the same company as that causing the Amazfit Band 5.However, is it a simple clone of the category bestseller?Not really, because this new product is distinguished by a different software environment.The companion application is thus specific.This is ZEPP which displays a rather elegant interface and many features in particular personalization.The hardware base is very close: this is the case for example of the 1.1 inch OLED screen and it is rather good news, because it is simply excellent.The battery is also identical as well as the philosophy of the interface and the different menus.

However, the Amazfit Band 5 is even more complete than its Germain cousin.Athletes will appreciate for example the appearance of the oxygen saturation of blood, a function called Oxygenbeats.The bracelet records your heart rate 24 hours a day and can alert you if its sensors perceive an abnormal behavior of your heart.Sleep monitoring and relaxation aid are also present.Alexa is also there, which therefore means that a microphone is now located in the connected bracelet which therefore hides its game.The Amazfit Band 5 natively supports 11 different sports and has specific monitoring for women.

Fitbit load 4

We like the arrival of the GPS✅ interface of the application ✅ Interchangeable bracelet✅ overall quality of the producton does not like screen not always readable in full sun❌ no storage for music❌ Price

With identical characteristics, load 4 is not the cheapest that we can find but the quality is there.Fitbit has an undeniable know-how in terms of connected bracelet and the load 4 is pleasant to use even if it is not free from defects.The arrival of an autonomous GPS is a real plus which finally puts it at the level of the competition.Charge 4 will be perfect for those who wish to assess their physical activity on a daily basis.

What is a connected watch for?

Watches and bracelets are said to be connected, but connected to what and especially for what to do?The first generations included connectivity which is often limited to Bluetooth alone.This connection is mainly there to connect the watch or bracelet to a smartphone and the Accessory Companion Application.In this case, the smartphone then offers information geolocation of its GPS as well as its Internet connection.From there, you can receive your messages, or various notifications from its usual applications.

A completely detached watch from the smartphone

But the model is evolving.We note that more and more connected watches are oriented towards complete independence from the smartphone.Several manufacturers today offer watches with characteristics that allow them to be 100 % autonomous.Thus, the latest generations of Apple Watch are 4G compatible, and therefore do not necessarily require Bluetooth connection to the smartphone to stay connected in all circumstances.

Ditto for models incorporating their own GPS chip and those, more and more numerous, which integrate some GO of memory dedicated to the storage of music or podcasts as well as a contactless payment system.All these new features allow you to run without having to take your smartphone in a pocket or an armband.

What is the difference between a watch and a connected bracelet

The two categories of products have cohabited on the market for years now, proof that there is probably room for both.So how to choose between the two types of products?First point, the budget.Connected bracelets are much cheaper than watches with, for example, xiaomi models that can be found largely below 50 €.The reasons for this price difference are easy to find.

Why buy a connected bracelet?

The bracelets are generally less sophisticated and powerful: they have fewer sensors and their connectivity is often less advanced.Their processor is more basic and their screen small, even sometimes non -tactile.The bracelets embark a low -capacity battery and the vast majority of models are satisfied for its manufacture of its good old plastic.Connected bracelets are more discreet.Smaller and light than a watch, they can seduce people who do not usually like to wear a watch or jewelry on the wrist.

Conversely, some are very attached to their classic tocante and simply do not want to change it.A connected bracelet carried on the other wrist is finally easily forgotten.The autonomy of this first category of products is mostly significantly higher than that of a connected watch.Depending on the model chosen and the consumer's activity level, it can easily reach the week while an Apple Watch for example claims an almost daily recharge.

More limited in terms of features, bracelets can contact less comfortable people with new technologies.We think in particular of the elderly or children, but not only.They can also constitute a kind of gallop of testable at least fresh before perhaps going further and acquiring a connected watch.

Why buy a connected watch?

You will understand, connected watches present the faults of their qualities.More sophisticated and powerful, they are necessarily more expensive and bulky.Their screen takes the opportunity to grow in order to offer a more user -friendly interface to better use more and more functionalities.More powerful and larger screen processor necessarily translate into reduced autonomy.It is even more significant when the GPS chip and possible 4G connectivity are used.This increased complexity often makes connected watches a little more fragile than the bracelets.

Which operating system to favor?

The choice of your smartwatch or your connected bracelet can be done according to the design, the features and the various sensors it incorporates, but an even more important criterion may be to be studied closely in the case of watches: that of the systemof exploitation and its compatibility.Indeed, if most can be connected in Bluetooth to iPhone or Android smartphones, there are certain restrictions and even some exceptions.

Google Wear OS

Part of the connected watch manufacturers have decided to equip their devices with the Google operating system dedicated to smartwatch: Wear Os by Google (Wear OS in abbreviated shape) in order to make the brand more "universal" and less exclusively associated withAndroid since, according to Google, one in three Wear OS watch is used with an iPhone.But if the name has changed, the features remain the same.If Wear OS is compatible with the iPhone, the features remain in this case a little more limited in particular on the question of notifications and interaction possibilities.

Concretely, this system has the advantage of being compatible with all Android smartphones and very simply allow the installation of app/cations from its smartphone from the Play Store.It is the only bone that can be found in different manufacturers.Indeed, the other systems are reserved for products of a single brand.News seems to be less intense for this bone.Updates from Google are long overdue and manufacturer's announcements less frequent than before.But the American giant reassures: Wear OS is far from abandoned.

Watchos at Apple

For its part, Apple has chosen simplicity ... and exclusivity even if it means depriving itself of a large number of potential buyers.Indeed, the Apple Watch and their house operating system (Watchos) are only compatible with the iPhone ... and still not all.Indeed, today, the American giant offers on its site the Apple Watch 3, SE and 6 which require at least an iPhone 6s and iOS 13.

Samsung, Huawei, Garmin, Fitbit, etc..: alternative systems

Two major connected watch manufacturers have chosen to leave Google's OS to adopt home systems.We talk of course about Samsung and Huawei.The first uses Tizen OS.It is both more practical and intuitive than Wear Os by Google (especially because of the rotary crown in reality) and more open than the Apple Watchos, but also more limited when the watch is used with an iPhone.The second develops Liteos which also works with an Android smartphone or an iPhone, with in the latter case the same restrictions as its counterparts.

Brands specializing in sport now all offer connected models that often rely on owner bones.This is particularly the case of Garmin or Fitbit while Suunto and Polar offer in their range two types of watches: under proprietary bone and under Wear OS.

Can you call with your watch?

Upon receipt of a call, the name of the contact and sometimes its photo can be displayed on the screen of the watch or connected bracelet, but it is generally essential to enter the smartphone to take the communication.Nevertheless, some models of smartwatches allow you to respond from your wrist.This artifice straight inherited from K2000 has been the subject of many mockery, it continues to develop on new models which are now able to ensure communication thanks to a speaker and an integrated microphone.

Finally, it is clear that you can find it a use, driving in particular or cooking.Another possibility, couple your connected watch to Bluetooth headphones.These same models can be equipped with dematerialized ESIM chips, which allows them to connect to the mobile network without the help of a smartphone while sharing the same number as this one.For this, the offer must be offered by your mobile operator.

Are all connected watches waterproof?

Today almost all of the connected bracelets and watches are waterproof, at least 1 or 2 m of water.These are the famous IP standards.Please note, some manufacturers talk about fresh water, then excluding any application from the warranty in the event of immersion in sea water or even chlorinated water.Others simply specify that it is necessary to rinse the product after a bath of this type to avoid the risks of corrosion of electronics in particular.

Some models benefit from a further tightness which is then expressed in ATM, 5 ATM corresponding to a pressure equivalent to a depth of 50 meters.Be careful, that does not mean that you can dive without thinking about a depth of 50 meters.Indeed, this classification which comes from the world of classical watchmaking is more empirical than scientist.Thus, a seal of 5 ATM would mean that the watch resists a complete immersion in a swimming pool or a calm pool, but not to the exposure to a powerful jet directed to its glass and its buttons or even dives.

Should it be recharged every day its watch or its connected bracelet?

If the autonomy is often greater than a week for connected bracelets, it remains the main weak point of the smartwatches, despite, it is true, some significant progress.We note for example the effort made by Xiaomi with the Mi Watch, its round connected watch which offers 16 days of autonomy.If they did not exceed a full day for the first generations, most can now claim to go beyond 48 hours.It remains relatively little, but ultimately it has become so natural today to recharge your smartphone and Bluetooth helmet when you get home in the evening that it is not a problem for everyone.Some models manage to do well in this exercise.We think in particular of the Fitbit Versa 2 which resists without difficulty at 4 days of use or even the surprising Huawei Watch GT 2 capable of exceeding the week.

Of course, the figures in terms of autonomy are to be taken with tweezers, because they depend a lot on the use you make on your connected watch.The use of GPS for running session will immediately reduce the autonomy of your tocante.

How to load your connected watch?

The connected bracelets and watches being full of sensors and connected in Bluetooth or WiFi to your smartphone, it is obviously necessary to supply them with energy.To do this, there are two options depending on the device chosen: batteries or battery.

The batteries are reserved for activity sensors such as Misfit Shine 2 or certain hybrid connected watches like.They mainly have the interest of keeping the active device for a very long time, often several months, up to a year.It may, however, be more complicated to find replacement buttons when the product arrives in a battery harbor than having access to a power outlet.In addition, replacing a battery involves opening the watch box which can potentially lose its waterproofing in the event of bad reassembly.

The second option for supplying connected bracelets and smartwatches is the rechargeable battery via a USB cable.Beware, however, of autonomy, much less important than with a button battery.It is often limited to one, even two weeks for bracelets, and a few days for watches.This is the solution adopted by most manufacturers.On the other hand, the presence of a heart rate sensor or a GPS very significantly impacts the batteries' autonomy.As a rule, the more your device will integrate sensors and functionalities, the less its autonomy will be important, a fortiori if it is equipped with a screen.

Wired chargers still owners

Small precaution to take: do not equal the charging base supplied with your watch or your connected bracelet.Indeed, if the case is almost adjusted with regard to smartphones, each product of this type has its own charging base for it.Finding the accessory of a recent and/or widely used model is not really complicated, it is not the same for older or rare products.

Some products are put to solar energy.Photovoltaic cells hidden behind the screen will recharge the battery of the connected watch.This technology is used for example by Garmin and G-Shock.

Can connected watches play the luxury card?

As the smartwatches market is gaining maturity, manufacturers have realized that expectations differ from one individual to another.It is now possible to choose from different types of materials, colors and sizes concerning the case or the bracelet.

This is particularly the case of Apple, whose Watch Series 5 is available in two boxes of boxes, 40 and 44 mm, each time with its batch of bracelets: steel, rubber, leather ... On the other hand, the fixing systemexclusive to the brand prevents standard bracelets with it.Do not panic, there are hundreds of models from third brands on the net for original and less expensive bracelets than "officials".Apple's smartwatch exists in several materials, with classic designs, sport (Nike+version) or downright luxurious with the hermès declination.Others play the card of simplicity, like Samsung, Nokia, Garmin, Fossil or Diesel, whose boxes can accommodate standard size bracelets (22, 24 or 26 mm most often), so that everyoneMay find his account.

Some large Swiss houses in so -called traditional watchmaking have also started connected products.They of course keep a more luxurious side with high quality materials and simply perfect assembly qualities.We then think of Frédérique Constant or Tag Heuer.

What do connected bracelets and watches measure?

In addition to consulting the time or notifications, monitoring physical activity is one of the main interests of connected watches and bracelets.When these products are helpless of GPS chip, this data is often based on calculations which cannot claim absolute reliability.They are the result of the combination of sensor and algorithms that weighed them.It is also true that the human body is not easy to model.So, whatever your choice, use the data provided to set goals and not in order to obtain perfectly reliable measurements.

Health measures in mess

Today, almost all connected bracelets and watches measure your heart rate thanks to the light changes reflected in the blood vessels of the wrist.Apple goes even further from its Apple Watch 4 and Watchos 5.2.Indeed, this update brings the ECG application and the notification of arrhythmia.

This application is similar to an electrocardiogram statement which therefore records the cardiac rhythm of the person wearing the watch when it feels a disturbing symptom such as a surprisingly rapid rhythm or an extrasystole, that is to say airregular rhythm.Some models also allow the VO2 Max to measure, a data particularly interesting for athletes, because it establishes the maximum oxygen consumption by the body over a given time and by kg.This is a very important factor to know its level of form in the training phase.Some models also measure the oxygen level in the blood.

The accelerometer for the distance

For the distance, it is the accelerometer, cut with the size of the bracelet carrier, which estimates the measurements.For more precision, you have to turn to the essential GPS.Tested during a 1.1 km walk, most will give a correct estimate, even if they remain largely influenced by the movements of the arm.If therefore you hold something by hand equipped with the bracelet, the calculations will logically be less generous.The same goes for motion sensors that it is better to clip on a garment in order to have the most reliable measurements possible.

How does a watch measure the calories burned?

To estimate the calorie expenditure, the connected bracelets and watches are based first on the information provided by the bracelet carrier (size, weight, age, etc.).From this data, the number of metabolic calories (those you burn whatever happens) will be estimated.The figures are obviously very variable from one individual to another, but are around 40 and 100 calories per hour on average.A small woman will burn much less than a man of a big size.Then intervene the active calories (those which depend on the exercise you do) which are estimated according to the data collected by the accelerometer.

Very often the bracelets offer only one measure, that of the total number of calories burned.Some, on the other hand, operate a distinction between metabolic calories and active calories.But this data remains generally impossible to check without carrying out pushed laboratory tests.We must therefore consider that this is only an order of magnitude.If we believe Laure Jouteau, Marketing and Communication Director of Cityzen Sciences (a company specializing in the integration of sensors in textiles for sportsmen), the calculation of calories carried out only from the number of steps given by the'accelerometer has an error rate of 30 %.

Today, high -end models intended for athletes are capable of measuring the oxygen level in the blood.They sometimes also have a barometer, a barometric altimeter ...

Sleep measurement: all watches are not equal

It is surely about sleep that measures most often become approximate.Most bracelets equipped with their only accelerometer try to estimate the quality of your sleep by providing you in particular a distribution between light and deep sleep.It is therefore your propensity to fidget during the night that will be analyzed.Suffice to say that in the morning you will not always be in line with the results displayed.Fitbit puts its measure of the quality of sleep with the follow -up of female health that the American brand highlights a lot in recent years.The quality of sleep depends in part on the moment of the cycle in which the user is located.

A very large number, if not almost all, connected watches and bracelets has a silent awakening.To warn you that it is time to get up, the bracelet vibrates in silence to your arm, with regular recovery.Ideal for household peace!In addition, some models offer to wake up in a time slot depending on the intensity of your sleep.

If, for example, you get up no later than 7 a.m., you can define a 30 -minute time slot (you see) during which you let your bracelet take the initiative to wake up according to the intensity of your sleep.Race result, the alarm will sound regularly at 6:30 a.m. (instead of 7 a.m.).And in these moments, you will above all have the impression of having you fly 30 minutes of sleep instead of feeling the benefits of a fulfilled awakening and in line with your cycles.

What is a hybrid connected watch?

Some people are not very sensitive to the charms of watches with a screen with the drawbacks that this implies, especially in terms of autonomy.They often prefer good old needles that indicate the time in all circumstances and always readable.Some brands have understood this and try to couple these needles and the contribution of new technologies.

For this, several schools coexist, including in the same designer.Some play a 100 % old school card.The watch dial is very classic appearance and connected functions do not appear at first glance.A button can allow needles to change position to indicate the percentage of daily activity carried out until then or the notifications materialize by vibrations or there also by needle movements.

Other manufacturers have opted for a frame which, in addition to traditional needles, incorporates a small screen on which will appear information relating to connected functions.