How do I open permissions on an iPhone?

Open mobile phone settings -> LIVALL Riding.

Other
How do I open permissions on Android?
How do I open permissions on an iPhone?
How do I ensure the device works on Android when the screen is locked?
After upgrading ios 11, turn on Bluetooth, why is APP still reminded that Bluetooth is not enabled? How to deal with it?
Does APP support third-party heart rate equipment?