I have this InkBird and love it. But it is a bit pricy. I had to have wifi connections on this one and I absolutely love it

Inkbird IBT-4XS Bluetooth... https://www.amazon.com/dp/B076QDC5VL?ref=ppx_pop_mob_ap_share

The big thing I learned was that just because I set my heat gun to X temp, doesn't mean it's going to instantly put out X temp or that the temperature of air hitting the beans will be X.

It's important to pay attention to how quickly the temp is rising, to get an idea how many degrees the temp is rising per minute.

So, I do think a thermometer is relatively important, at least in the beginning... And probably important in terms of reproducibility.

The graphs are from the thermometer app. It's Bluetooth thermometer that connects with your phone (to keep an eye on grill temp remotely). The app gives me the graph live during the roast, which is pretty cool but not as good as the artisan program everyone talks about.

It's pretty good middle of the road thermometer that I've been using to BBQ for a couple years. It's nice that it comes with 4 probes.

Inkbird IBT-4XS Bluetooth Wireless Grill BBQ Thermometer for Grilling with 4 Probes, Rechargeable Battery, Timer, Alarm,150 ft Barbecue Cooking Kitche https://www.amazon.com/dp/B076QDC5VL/ref=cm_sw_r_cp_apip_Ut4I9ENiYxHV8

I find that simple is best. Don’t spend that much, it’s not necessary. I like this one for everyday use: https://www.amazon.com/Cooking-Thermometer-Digital-Instant-Accuracy/dp/B07H8X98BQ

And this for roasting and hitting perfect temps on reverse seer, but they never seem to last too long, maybe a year or so, but it’s nice to be able to walk away and check on your temps from your phone. https://www.amazon.com/Inkbird-Bluetooth-Wireless-Thermometer-Li-Battery/dp/B076QDC5VL/ref=mp_s_a_1_1?ie=UTF8&qid=1548095166&sr=8-1-spons&pi=AC_SX236_SY340_QL65&keywords=grill+thermometer+bluetooth&psc=1