> I'd had luck using temperature probes for things like chicken, but that doesn't work for eggs, fish, etc. Why not use a temperature sensor and an app; why do

> I'd had luck using temperature probes for things like chicken, but that doesn't work for eggs, fish, etc. Why not use a temperature sensor and an app; why do I need to buy a whole pan? Is it that hard to for a sensor to read the heat of the pan's surface without being integrated?