There is also the Google Play version is discouraged. See below for the reasons:
What are the differences?
F-Droid: The Activity Detection feature isn't included as it relies on the Play Services. Everything else works.
APK version: No limitations in functionality whatsoever. It won't update to newer version automatically, but in settings you can activate an automatic check for new versions.
Google Play: If you're above Android 9 location based rules don't work anymore. Also phone-related rules (calls or send sms) don't work here - thank Google for that. Google burdends developers with more and more ridiculous restrictions every ear. I've tried to reason with them, but it fails every time. So all I can do is remove feature after feature from that version. It's also the least tested one.