LOGINWITH
An intriguing application this one, and one that I quite like and feel others would too.
For the problem with catch-all facilities like this is ultimately, if they've got into your laptop and figured out your Google password then it's 'Hi caramba'.
In fact one of the fastest shoot-downs on Dragons Den (think Shark Tank) was a guy with a plug-in device with all your passwords on it... and if that gets stolen, they said?
I don't know yet the ins and outs, and we do know Google is the 800-pound gorilla. In fact they gave away their own form of Captcha just to squash all of the others.
At the end of the day though, ours is better than yours... much as I love them and this is written on one of their (bought in) platforms.
The patent may yet be the key, moreso than the app. Many years ago, just to challenge one that had already be granted in the US cost around a three-quarter million dollars.
One then worth investigating.