Yakihonne does indeed cover all the bases, iOS, android, browser. And its my daily driver and they do a great job and i shill it to everyone that asks. BUT, I still don't want to give specific app recommendations for both practical and principal reasons. Unless the specific app is specifically designed to be uninstalled eventually. Oeh, that would also be a nice feature, the app either forgetting your keypair, or just outright bricking itself after some time; no backup? R3kt💀