Two options are available:
1 - Preset sleep time:
- Open ZeCircle App
- Go to Settings > Advanced Settings > tap Preset Sleep to enter your desired bed and wake up times.
By default, ZeCircle will track your sleep from 11pm until 7am
2 - Start / Exit sleep from ZeCircle app
- Open ZeCircle App
- Tap on the bottom purple sleep bar
- Click on Add sleep > Start sleep now
- To end sleep, open ZeCircle App, tap on the bottom purple sleep bar, click on Add sleep > Awake