It fails in any way possible. Just the fact you need to create a huge, convoluted, kilometric password beats any purpose this app could have. This app is supposed to help you control your house, you can't because you can't ever login, you'll spend more time trying to login than the time you spend standing up and lock that door or turn that light on at home. Biometrics doesn't work AT ALL,. A message to the devs: if you can't make the Biometrics work maybe you should not develop Android apps.