If you're home or not upstairs asleep I guess it's sufficient
(of course, where they're really useful is as office fridges, when the perpetrator wanders off oblivious but someone else gets driven mad by the just-barely-audible-beeping and hunts it down...)
Ok, I’ll bite. What do you do? Your phone has just told you the fridge door is open. Now what? You aren’t at home, so you can’t close it.
We came home on Sunday to the fridge and freezer completely ambient temp and had to toss everything.
If we had a mobile alert on our phone, we could have turned around and closed it just fine, or asked our neighbor to.