It sounds like an eclectic mix but, realistically, they're all very useful and I made the most of them all in my first week of testing. With one push of the button on the side, you can access a whole variety of apps - from your statistics for the day to exercise modes, alarms and timers, useful apps like Fitbit Pay, and even the weather. The Sense 2 and Versa 4 both offer six-day battery life and support fast charging - a 12-minute charge will provide a day's worth of battery life.Using the Fitbit Versa 4 is an incredibly easy and sleek experience.

Both watches will also receive an update that brings Google Maps and Google Wallet in the future. The smart features are identical for both watches with support for calls, text and app notifications, built-in Amazon Alexa, Fitbit Pay, Find My Phone, and compatibility with Android and iOS devices. They also have sleep tracking and women's health tracking. It also has stress monitoring but not on the same level as the Sense 2.įitbit's new smartwatches can track more than 40 different workouts and exercises and have a built-in GNSS chip (GPS & GLONASS), NFC and Wi-Fi. While the Versa 4 doesn't have an ECG sensor, it has support for irregular heart rhythm notifications which can also be used to detect signs of atrial fibrillation (AFib). Fitbit also includes red and infrared sensors for blood oxygen saturation (SpO2) monitoring. There is a heart rate sensor for all-day tracking on both watches with notifications for high and low heart rates. Both the Sense 2 and Versa 4 have a color display with always-on display support.

Fitbit versa 2 vs versa 4