It seems easy these days to find a complex, "powerful", "cloud based" security system.

What I've been struggling to find is a reliable, simple, easy to use, residential FOB system for 1-5 doors and 1-5 users.

Problem statement: my father-in-law has never locked the door in his life; if I want to change this habit, it has to be as simple and easy as possible. A FOB would be ideal - just tap his keychain/wallet/whatever and go. But I'm struggling to find something that isn't wireless and complex and server/cloud based... :-<