Not op but I mean you can use a public cloud with Cryptomator on top if you don’t trust your password DB on a non E2E cloud. Or you can just use your own cloud (but then no access outside or can risk and open up infra), and then any of the well known clients on your phone. Can optionally sandbox them if possible and then just be mindful of sync conflicts with the DB file but I assume you, like most people, will 99.9% of the time be reading the DB not writing to it.