OBD Fusion Download Link: App Store “OBD Fusion” (apple.com)

NOTE:
Just enable Bluetooth settings on your iOS device.
DO NOT Need to connect Bluetooth Name on iOS device.
Then connect the Bluetooth device name in the OBD app setting.

Step1:
Open the app and click on "Settings".





Step2:
Click on :"Preferences".





Step3:
Click on :"Communications".





Step4:
Click on :"Type".





Step5:
Select "Bluetool LE" as the connection type.





Step6:
After selecting the correct type, return to the home page and click on "Connect".





Step7:
Wait for the device to connect successfully.





Step8:
Connected successfully.