TASKER
Sorry, cut and paste, but better than I could write
No repetitive tasks for you, let your Android device handle it! Total Automation, From Settings to SMS.
Here are only some of the things you could do with Tasker. Its real power is the flexibility to combine contexts and tasks however you wish: Tasker for Android
Automations
Make your phone a true smart phone! Why remember to change the volume every day when you leave home when your phone can do it for you?
Automate stuff based on the app you’re in , the time of day , your location , your Wi-Fi network , Received SMS or Calls , the currently playing song and many other (130+) states and events!
Check out how easy it is to create an automation: https://www.youtube.com/watch?v=s6EAbLW5WSk
Actions
350+ actions allow you to truly customize your phone like never before! Send SMS, create notifications, change almost any system setting like Wifi Tether, Dark Mode, Always On Display, change any volume, control Do Not Disturb, open apps, file manipulation, control music playback, get your location… you get the idea. If you can think of it, Tasker can probably do it for you!
Note: root is NOT (I repeat NOT) required for majority of the functions. However, a few of the actions (like the Kill App and Mobile Data action on some devices) require root. This is because of Android security policies that developers cannot work around.
Here’s a great example
Thanks @rosco