I personally use Disroot along with Thunderbird 😁

I would personally recommend KeepassXC foe PC and KeepassDX for Android phones, just having your Vault available locally is a lot better than relying on a server that can get a security breach in any moment, not to mention the Keepass’s Vaults are encrypted and no one can access them without the , key or physical key, with KeepassXC and KeepassDX, you only will need ONE password 😁