description Fitbit Versa 4 Overview
The Fitbit Versa 4 is a smartwatch featuring advanced sleep tracking capabilities, monitoring stages like REM and deep sleep to provide detailed insights into your nightly rest patterns and overall sleep quality metrics.
help Fitbit Versa 4 FAQ
Which sleep stages does Fitbit Versa 4 track?
Google's product listing says Versa 4 automatically tracks sleep duration and time in light, deep, and REM stages. It also provides a personalized Sleep Score for the previous night's sleep. [Google Store](https://store.google.com/us/product/fitbit_versa_4?hl=en-US&pli=1)
Can Fitbit Versa 4 wake me during a sleep stage?
Yes, its Smart Wake alarm uses a vibrating alarm and is designed to wake you during an optimal sleep stage. The detailed sleep history is viewed through the Fitbit app. [Google Store](https://store.google.com/us/product/fitbit_versa_4?hl=en-US&pli=1)
What phone platforms work with Fitbit Versa 4?
Versa 4 works with both iOS and Android phones. Google announced the watch in 2022 and listed more than six days of battery life, which supports wearing it overnight. [Google](https://blog.google/products-and-platforms/devices/fitbit/versa-4-sense-2/)
Does Fitbit Versa 4 need to be worn overnight for sleep stages?
Yes, the watch needs to be worn while you sleep so its sensors can estimate duration and stage data. Fitbit support says detailed stages may be missing if the device is loose, critically low on battery, or records less than three hours. [Fitbit support](https://community.fitbit.com/t5/Versa-4/Versa-4-isn-t-tracking-my-sleep-data/m-p/5371899)
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