The app is full screen on my Samsung mobile so your bottom navigation is underneath the onscreen Android navigation and unusable. Happy to submit an issue and screenshots if you have a GitHub repo.
I'm really sorry about your experience. Could you please let me know your device name and screen size? I will make sure to fix this, along with any other bugs people report here and push an update to the app stores by tonight.
Sometimes it takes a while for Google Pla to distribute the update in different parts of the world. Check Google Play in a few hours and it should be there. I have confirmed with multiple people and they say the issue has been fixed with the update. If you still have the issue you can always mail me.
Other than that, it is working nicely so far.