The Dot is much simpler. It’s just a thermometer that you can set an alarm to go off at a certain temperature. If you don’t need all the features on a ChefAlarm, why spend the money? I think I got my ChefAlarm before they came out with the Dot. The Dot would work just fine for me - I use it for meat in the oven.
I also put the probe in my freezer and snaked the cable to the outside where the display adhered magnetically to mr fridge door. I could then walk by and see the temp without opening the door. The freezer was dying. Got a new fridge before it was too late.