Fitbit flex: water resistance

It works with the Fitbit app to measure the number of steps, kilometers traveled, active minutes during the day. At night, it follows your sleep cycle and wakes you up silently, emitting vibrations. Practical, you can keep your wrist in the shower and vary the colors of bracelets. 10 shades available. 5 days of autonomy. Fitbit Flex, 99.95.

Polar Loop: non-stop visualization

With its integrated LED screen, this waterproof bracelet displays directly on the wrist data: number of steps, calories burned, type of activity practiced (walking, jogging ...). So, you do not have to consult your smartphone constantly. Combined with the Polar app, it details walking, running, lying, standing, and even offers a summary calendar of activities. Available in 3 colors. 4 days of autonomy. Polar Loop, 99.90.

Epson Pulsense PS-100: tailor-made balance sheet

Paired with the Epson app, it measures your heart rate through an optical sensor, but also the number of calories burned and sleep cycles. Every week, a report is sent by email to help you achieve your goals and stay on course. Only downside: barely 36 hours of autonomy in continuous use. Epson Pulsense PS-100, 149.99.

Withings Pulse 02: Oxygen measurement

This tracker that looks almost like a watch can also be worn at the waist, like a pedometer. Combined with the Health Mate app, it saves all data. The app measures the heart rate, simply by putting your finger on the smartphone. Worn on the wrist, it measures the quality of sleep. During the effort, he is able to evaluate the oxygen level in the blood. It is the only one to measure the unevennesses. 2 colors. 5 to 6 days of autonomy. Pulse 02 of Withings, 119.95.

Up24 of Jawbone: extreme finesse

It works as a duo with the Up app. During the day, he counts the number of steps. At night, he analyzes the quality of sleep. It can also count calories to help you better manage your weight. Just indicate to your smartphone the food you eat. As a bonus, it serves as an alarm clock. 5 colors. 10 days of autonomy. Up24 of Jawbone, 129.99.

Vívofit of Garmin: unbeatable autonomy

Record autonomy of one year without charge. Waterproof to 50 m, its screen displays the data: calories spent, distance traveled. Connected to the Connect app, it sets the objectives and alerts you in case of prolonged inactivity. Once the challenges are met, you receive a virtual medal. It tells you about the quality of your sleep and combines with a heart rate monitor. 5 shades. Vívofit of Garmin, 119.