Earlier quoted context omitted.
You could do this today without any sort of "smart" appliance for about $1.00, $50 if you are being lazy. Just get a super simple micro-controller and radio on a board and throw it into your fridge. Have it record the temperature at a regular interval into a ring buffer and poll it periodically from a chron script. Get your power from the light switch in the fridge door. Alternatively, a Li-po or Li-ion battery can l…
Or even simpler, put a cheap analog thermometer which records the min and max temperature in your fridge. Maybe not exactly this one, but something like that: https://images-na.ssl-images-amazon.com/images/I/61jmAUQ70pL...
It would have been more handy if the thermometer's min and max responded more slowly to reject these short fluctuations.