for android you can take a look at nostr:nprofile1qqszpxr0hql8whvk6xyv5hya7yxwd4snur4hu4mg5rctz2ehekkzrvc64twc2 . The point Miljan makes here does stand, it takes a lot to get a reliable polished product.

Amethyst took a big hit in terms of reliability after their big recent overhaul but i expect things to improve over time (as they already have).