This thermometer from Thermoworks is an essential tool used daily in our kitchen. Of course it’s handy for grilling, but I use it to check doneness on a wide range of foods from baked potatoes to Artisan bread. And if you want a longer list check out Serious Eats piece “Why do I need an instant read thermometer?”
Good news is that both the Thermapen and the Thermopop are on special until the end of August. Custard, doughnuts . . .lots of things need precision.