Tomtom | Vio Hack

: Enable "Install from Unknown Sources" in your Android settings to allow the sideloading of the VIO APK.

If you see this menu, you have won half the battle. This is the stock recovery environment.

I believe you're referring to the (or similar TomTom devices like the Go, One, or Rider) and the concept of "hacking" it—either for unlocking navigation features , installing custom software , or repurposing the hardware (e.g., running Linux, custom apps, or accessing the filesystem).