Habitify - The easiest way to keep track of your habits

Tasker - Tasker is an application for Android which performs Tasks (sets of Actions) based on Contexts...

everyday.app - Every day, it gets a little easier. But you gotta do it every day, that's the hard part.

LibreTasks - Trigger actions when certain events happen.

Repeat - Cross-platform mouse/keyboard record-and-replay automation with advanced programming features.

Automate - Automate various tasks on your Android smartphone or tablet.