To analyze your sleep, download Sleep Cycle (iOS) or Sleep as Android. (Android)
If you are an iPhone user:
Go to the Sleep Cycle app and select Settings in the lower right corner
Scroll to the bottom of the screen and select Advanced
Tap the Apple Health
Tap Connect to Health in order to turn it on
Tap Turn on all Categories and Allow in the upper right corner
If you are an Android user:
Go to the Sleep as Android app and select Settings
Tap Services
Turn on Google Fit
Choose your Google Fit account
Allow Google Fit to get data
Tap the button on the bottom right to save your settings