The software stack includes a (U-Boot is common). If the bootloader is unlocked, you are the king of the device. If it is locked with a password, you are stuck.
The app itself allows you to change the "skin" and map colors to match your scooter's style. Manual Color Scheme Editing (Android): Tomtom Vio Hack
The TomTom VIO was a revolutionary "connected" scooter sat-nav, designed to act as a secondary display for your smartphone's navigation. However, since TomTom officially and removed the dedicated app from the App Store and Google Play on January 31, 2022, many users feel they are left with a stylish but useless paperweight. The software stack includes a (U-Boot is common)