Obsession
Remember why you bought it.
Obsession is a journal for the things you can't stop collecting. Photograph something you own, turn it into a sticker, and write down why you chose it. The app counts the days you've owned it, brings old favourites back, lets you rank your own things in quick duels and shows what your collection really cost.
It never shows you something to buy. There's no account and no ads, and everything stays on your phone.