FonBot .apk file for installing to your phone.
(your phone will give you warnings against this.)
FonBot .aia file for importing and editing in MIT App Inventor 2
NOTE - this will take you to a page with three folders - just click Download (down-pointing arrow in Chrome at upper right of page) and it will download the intact .aia file.
FonBot 3D Body - .stl file for 3D printing
You need to make the opening fit your phone (probably larger). You may need to enlarge the body as well.
FonBot's body was totally designed in TinkerCAD. If you want to learn 3D design, TinkerCAD is totally free, simple, and a great place to start: TinkerCAD Website
You will need to adjust the slot for the phone to your phone size:
The slot for you phone in TinkerCAD is known as a "hole"
Measure you phone - your Volume buttons and Camera are the widest points!
Make the dimensions of the hole to fit your phone, plus ~ 1 mm
You will probably have to enlarge (scale) the whole body to fit your phone.