This happens when the Lark unit is unable to connect to your phone/mobile device when you turn off your alarm. The best course of action is to try a few steps to reconnect the Lark with your phone, and the data will appear in your history tab.
- Ensure that Bluetooth is turned on (go to your phone's "Settings" -> "General" -> Bluetooth and make sure it's on)
- Plug the Lark into the stand (check to see that the light is solid red or green), and wait 10 seconds (The bluetooth icon at the upper right should be white, or should flash and then become white).
- Open the Lark app. A message should show up saying "Lark is ready!" At that point, your data should be visible in your history tab.
If that doesn't work, make sure your alarm is not still running (check the "Alarms" tab in the app). If it is, turn it off in the "Alarms" tab. The data should show up shortly. (Data is only collected once the alarm is turned off)
If Lark is still not found, you may be experiencing pairing issues. Please see pairing issues, but note that if you reset your Lark device, your last session's data will be lost.