Tasker

Tasker is a powerful automation app for Android that runs user-defined tasks based on contexts such as the active application, time, date, location, an event, or a gesture. You build profiles that fire automatically or trigger tasks from home-screen widgets, chaining together actions like changing settings, sending an SMS with your GPS location, recording calls, launching apps, toggling Bluetooth or Wi-Fi, text-to-speech, and device-sensor reactions (for example, doing something when you tilt or turn the phone). It can track battery and location and run automatic backups. Tasker is a long-standing favorite among Android power users for replacing dozens of single-purpose apps with custom automations. A 7-day trial is available directly, with the full version sold through the Google Play Store.