Feel free to leave feedback about Takataka in this discussion board, or via this contact form:
https://540software.com/contact

If you encounter any bugs, you can also leave that information here or you can use the in-app Bug Report link from inside the About window  (The About window can be accessed from the question mark in the top right corner of the app.)

Full app documentation is available here:
https://540software.com/docs/takataka