Thanks for mentioning it. I found it, but it doesn't seem to be working. I'll have to try some other sites, but the first two sites I tried failed. It didn't fill anything. It's a little less work than switching between apps, so if it works that would be good. But yeah, I wish it were there for the apps.

To illustrate how Lastpass works on Android, here's a 15 second video that's longer than the process actually takes.