@siderea
Sometimes you can kind of do that by downloading the app from multiple places, but it depends on if they use a different internal name. Unfortunately FairEmail does not; downloading from github, play, and fdroid all use eu.faircode.email . Don't know about K-9. If you built it yourself it'd be easy to change the name, but I doubt this is the answer you're looking for.
walnut 🌱
@walnut@thesoftestpaws.net