I'm pretty sure it requires gapps, although I did see a websockets version so not 100%. Also, keeping your own builds up to date is possible, but a hassle. For

I'm pretty sure it requires gapps, although I did see a websockets version so not 100%. Also, keeping your own builds up to date is possible, but a hassle. For anyone else doing that https://f-droid.org/repository/browse/?fdid=fr.kwiatkowski.ApkTrack https://f-droid.org/repository/browse/?fdid=fr.kwiatkowski.A... is an easy way to ensure your apks are up to date without a repo store.