Smartphone Vibration Sensor Mount for 20 x 20 Marker Rail!

So I wanted to study the vibration signatures of my 3D printers and it hit me that the easiest (also quickest) was to use an older iPhone 4s which I was using for timelapse videos but how to mount it? Well I found a bike mount on Thinigiverse which was written in Open-SCAD and (here is the orignal: https://www.thingiverse.com/thing:426872) was able to modify it from a round tube to a square one for the 20 x 20 maker-rail on many of my printers. Then I needed an app and while I am an Apple Dev,