Re: Use for NFC?
I tried Smart Lock and found it didn't work. Specifically, the "trusted places" part was not accurate enough. It seemed to be based on the generic Android location service, which seems to use cell towers, which can be wrong by 100s of yards. I don't see an option to require a specific WiFi connection.
Also, it would unlock automatically whenever it thought it was close to the location. That's unsafe: someone could steal my phone and unlock it just by standing outside my house. Smart lock should never unlock. Instead it should merely prevent the phone from relocking (after being unlocked manually).
I previously used an app called Unlock with Wifi that got all this right. That app doesn't work with Lollipop, because the author is a tit. Currently I use Llama instead.