In the manifest, the app targets SDK 10. This causes the app to look like an old app instead of being rendered like other Android 4.x apps. Ideally, the target version should be the latest version of the SDK that the developer verified works properly. Presently, I'd recommend targeting SDK 19 (while keeping the min SDK as-is).
This would fix the use of 2.x-style titlebar issues in the lens list, UI widgets in the camera settings, and other misc. things throughout the app.
targeting sdk10 was a quick-fix to solve issue #1 (show menu button)
As soon as there is a solid solution for opening menu I will reset sdk to 18
solved by steve - thanks!
Currently the app page in F-Droid displays a warning when viewed on Google Android 14