I did more (or less) activity than Lark reports

Because Lark uses your phone’s sensors to track your activity, the activity will not be recorded in the app if your phone was not with you during the time you performed it. Always make sure to have your phone with you in order to get the most accurate reading possible from Lark.

If you forgot your device, you can add your activity in manually. 

The more consistent you are in your tracking, the more accurate Lark's advice will be!