How Do I Undo An Accidental Completion?

If a task is completed by mistake, there are two ways to undo it.

Shake your iPhone or iPad straight after the mistake to undo the most recent completion. This is only available for a short time afterwards.

You can also change any day in a task’s history:

Tap the Settings icon (bottom left).
Tap the … button that appears over the task.
Tap Edit History to open the task’s calendar. A grown-up check may appear first.
Tap the day you want to change.

Each day can be set to complete, missed or skipped. To undo a completion, change the day back to a faded circle.