If you are doing a Step Challenge, you can add a wearable fitness tracking device to automatically track your progress in the Challenge. To do so, click the Manage Device from the main Groups and Challenges page.
If you do not have a tracker or are doing any Challenge activity other than Steps, use the calendar on the Challenge page to click the day you are recording your information for and enter your progress.
For “I Did It” Challenges, simply click “I Did It” every day you completed the activity. You cannot click “I Did It” for past days.