When you use a timer app, you have to set the timer by clicking and/or scrolling several times. It may be a bit troublesome.
Try this app called "One Touch Timer." Just tap the button you want to set, and the timer will start. When the time comes, the vibration will tell you it. You can cancel the vibration or use any sound or music you like. Easy to use!
30 seconds, 1 minute, 1m30s, 2m, 2m30, 3m, 3m30s, 4m, 4m30s, 5m, 10m, 15m, 20m, 30m, 45m are the preset time.
It is the easiest and simplest countdown timer.