1. Tap at the home and Settings. It is not BlackVue camera settings. You can make changes here in the BlackVue mobile application settings only.
2. You can change the speed unit, map service (ios only), and theme. You can also check the current app version. If there is any app version you need to update, go to Appstore or Google play to keep your app up to date.
Select map service (iOS only)
Select speed unit
Check for any new firmware update