I make the apps I want on my own phone, then put them out there for anyone else who wants them.
Most of them start the same way. I go looking for an app to do something, and the ones I find are full of ads, want me to sign up before I can do anything, or just don't look very nice. So I build my own version, and I keep at it until I would happily use it every day.
Most of the apps are completely free with no ads and no account, and wherever I can, your data stays on your phone.
Scan a card and it finds the exact printing, slides it into a sleeve and tells you what it's worth. Build your decks right next to your binders.
Scan the barcode on a case and it stands the game on a neon-lit shelf, spine and all. Over 60 platforms, from the ZX Spectrum to the Switch 2.
One small thing to go and notice each day, and a little journal for the moments you want to keep. No streaks and no scores.