Car Scanner ELM327 OBD2 download link: App Store - Car Scanner ELM OBD2” (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 tha app and click the "Settings" button in the top right corner.





Step2:
Click on "Adapter OBDII ELM327".





Step3:
Select "Bluetooth LE(4.0+)" as the connection type.





Step4:
Click on "Device name"





Step5:
Select "vLinker MC-IOS".





Step6:
After selecting the correct device, return to the home page.





Step7:
Click on "CONNECT".





Step8:
Wait for the app to connect to the vehicle.





Step9:
Connected successfully.





Step10:
If the app communicates successfully with the car, you can open the function you want to select.