Technology for remote control, bluetooth, WiFi, 4G. Which do you like
Bluetooth like iGrill is point to point and has limit effective distance of 100' or 200' feet.
WiFi has same distance as bluetooth. But if you can access it to Internet, then you can view it remotely worldwide.
But to access an WiFi equipment to Internet is a challenge. Not every non-I.T. person can manage it. There is plug and play WiFi access plan, but you need to pay server fee of $10 per year.
The most easiest way is 4G mobile phone. Everyone shall be able to manage it. You can monitor and control your BBQ from your mobile phone remotely. What is the minimum cost of 4G service per month.
If you want to buy BBQ thermometer or thermostat, which do you prefer, bluetooth, WiFi, or 4 G phone