It may seem unnecessary but in 2019, Google made it mandatory for any Android app to have location permissions in order to work with Bluetooth devices. This was done to prevent malicious apps from gathering location data from users without consent.
You can rest assured that Opum takes your privacy seriously and does not collect any location information from your phone.
Since Bluetooth is required to set-up, update and sync your Opum Digital Knee it is necessary to grant Location Permission. This is required only for Android phones to find your Digital Knee.