Trigger

9.3.1

Trigger is a nifty application for creating various tasks on your phone and automatically enabling them when certain conditions are met. Read more about Trigger  

There are some suggestions of tasks that you can check out or use the steps inside the app to create tasks of your own. You can set actions to be taken automatically whenever the battery goes below a certain level or you connect to a specific WiFi network. For example, you can automatically disable WiFi and Bluetooth connectivity when the battery drops below 20%.
 
The app has a set of actions that you can choose from and each task can be enabled or disabled at a certain time. Set tasks to launch certain apps when you're at home or change sound volume when you arrive at work. Aside from this, the app keeps a log with all the triggers that you’ve created and used.