Meditation Timer for Android is a free, open source app that can count and beep. It helps with repeating tasks, such as meditation.
In essence, it is a simpler version of Foto Timer, and a rewrite of the original Meditation Timer for PalmOS from 20 years ago.
Meditation Timer is working with "processes", which define how Meditation Timer counts, and how often it beeps. Processes can also be "chained" together, meaning that a process can automatically launch another.
Meditation Timer contains absolutely no "AI" whatsoever.