I agree it’s not complicated. It didn’t actually take me more than a few evenings to code it – I mean the OS version.
Seeing how little effort they have put into the UI though, I would actually be very surprised if they wrote the code from scratch.
Let’s wait to see more than a screenshot of what they have done. Whether or not it’s original work should be pretty obvious from various small details that are characteristic for my implementation.
But when it’s not, you should not use it. Especially to mount motors and stuff. It seems most folks who’ve built a few skates and put some miles (kilometers) on them know that. Maybe noobs don’t know yet.