The github repository is mostly empty of code. There is a project (empty) for Arduino firmware, and it looks like they are using an Arduino Nano as the device controller. And there's a project (empty) for Android code. I'd love to see actual code.

My questions would be 1) How is the Android device communicating with the Arduino device? My guess would be wi-fi or bluetooth. 2) What image recognition software did they use in the Android code 3) What other sensors on the Android did they actually use and how? 4) Is there any way to port this to IOS? 5) Is it generalizable to other hardware builds?

The hardware looks very simple. As a software developer I would want to know a lot more about how it works from the coding side.