Recover files of an App
What kind of App is Tricount? Meaning is it came pre-installed in your phone or you download it from Play store such as Google Play Store?

Answer to above question is IMP as Android File system maintain clear distinction between system apps (which are shipped by your device OEM) and Downloaded apps.

Assuming that it is a downloaded app, you can check below location:
/data/data/app-package-name
Where app-package-name is the name of the package (Given by the Developer who developed Tricount app).