That seems like a great policy to me. I bought a guitar tuner app in the past and that's exactly and all it did: act as a tuner. But it then got acquired by a company that sells guitar lessons and other things, and they completely f-ed up the app and it requires an account and a subscription now if you want to tune your guitar. Fortunately there are other options in the Play Store, but I paid like $15 or $20 for it at some point. This tempts me at a side comment about why I hate automatic updates, but I'll refrain. Luckily it was Android so I was able to backup the APK before they ruined the app, and I sideload it now. Along with old Pocket Casts, Audible, and a couple of others.

Was that DaTuner? I got really annoyed by that too.

I only go to F-droid for these utility apps.

Guitar tuners, flashlights, QR scanners, etc. Open source hobby-sized projects which are done when they're done.

This is a terrific strategy! I'm going to do exactly this. Thanks for sharing.

Cythara on f-droid for guitar tuning!