The Sonic Smart Hoverboard App by NINETEC is a free app available for Android devices. It allows you to customize your NINETEC hoverboard's settings and track your speed and distance traveled.

Once connected to your NINETEC hoverboard via Bluetooth, you can adjust the maximum speed, steering sensitivity, and driving force. You can also view your current speed, distance traveled, power consumption, remaining battery capacity, and device temperature.

In addition, the app can access GPS data from your smartphone and display your route on the map.

It is important to note that all safety instructions and legal regulations should be followed while riding.

Overall, the Sonic Smart Hoverboard App is a useful tool for NINETEC hoverboard owners who want to personalize their riding experience and track their progress.