Fitbit fitness trackers have dominated the wearable market of late, so it is not surprising that the Fitbit Charge 4 makes the list. This fitness tracker comes with a rechargeable battery that lasts up to 7 days of active usage. Its design is similar to the Charge 3 but with a higher-resolution touchscreen display. The device is water-resistant, with a built-in GPS, not like the previous version, so you can track your outdoor fitness activities. You can also make secure payments and pair them with Android, Windows, and iOS devices. Valued at 150$, this fitness tracker is a perfect choice for anyone interested in complete health data.