tapreminder

2. A feature in an app that reminds you to tap a button at the right time.

The tap reminder popped up just before the timer ran out.

3. A gentle sound or vibration that reminds you to tap the screen.

I felt a tap reminder on my watch and tapped to answer.

4. A note you make for yourself to remember to tap something later.

I set a tap reminder so I wouldn't forget to tap in at work.