Hi!
To join the test, please follow these steps:

1. First join the Google Group:
https://groups.google.com/g/brnowalks

2. Then open the testing opt-in link:
https://play.google.com/apps/testing/cz.brnowalks.app

3. After joining the test, install the app from Google Play:
https://play.google.com/store/apps/details?id=cz.brnowalks.app

Thank you so much for helping me test the app!