ChiGui app for iPhone and iPad
This is an app designed for Compass-and-straightedge construction.
Compass-and-straightedge construction, also known as ruler-and-compass construction or classical construction, is the construction of lengths, angles, and other geometric figures using only an idealized ruler and compass.
By the way, as Compass equivalence theorem has been given, function of moving distance is provided as CR Circle for your choice.
You can save your work and open it.
You can get the snapshot of your work and get the process to share.