Use APKPure App
Get Stopwatch/Countdown - Overlaid old version APK for Android
Simple stopwatch with countdown function. Over any other application.
Start/pause with 1 tap,
Set countdown start point sliding up.
Reset with 2 taps
Close with 3 taps
Countdown function can be disabled if you do not need it.
Font size can be adjusted.
Useful for chairman, public talks, LMM and other assigments