automation - How can I run a sequence of applications or actions on certain triggers on Android?

Is there is free application or some trick to run sequence of applications on android? For example I want to start the following sequence: Wi-Fi --> Tor --> Browser

Answer

You should try Tasker for simple interface and quick setup.

If you are willing to do something by code and very specific, a good alternative is onX by Microsoft, you can write your code to do exactly the things you wanna do. Also there are some ready recipes that you can quickly setup.