keepass2android added this some time ago and it has certainly helped wonders for me there with the automation of passwords in apps on my phone and tablet. That said it's only there on android. I'd love similar kinds of integrations/apis available on other platforms too.
Password managers seem like somewhat wasted effort when you pass all the plaintext around on Android. Feels like a security minefield; only a matter of time until a vulnerability or outright malicious app starts reading them.
Obviously if you can't use the password manager on mobile it's functionally worthless.
