What is a data presentation tool for program or system analysis?

Question

Android

I need to test an application on android. The application has a lot of activities, menus and context menus, a lot of lists. Before testing, I study the system. I started to build a mindmap, but this view is not very convenient, for example, the same activities, menus can be called in different places.
Tell me a tool that will help describe all the interactions of these activities, menus and actions assigned to them. In principle, mindmap can be used, but, as I said, it is not very convenient.

Answer 1

Draw full-fledged diagrams for complex logic, please! So everyone will understand. Dia for example.