Expert Grill is a companion app for using applicable grill devices. You can use our app to search and connect grill devices with your phone via Bluetooth. You can control the target temp setting and adjust the temp alarm. Furthermore, you can use the app to control the function mode of your grill, and change the temp units on the devices' display. If your phone not pairing with this APP, please comment with your phone model, we will update our support range. Thank you for your support.