[adtac]

https://github.com/fogleman/primitive

[marcalc]

Yeah, the concept is exactly this. But I remember they had created an iPhone app that was being sold for $9.99. Can you remember? Thank youuuuuu!

[a2m]

a mac app. it's called "Primitive for macOS"

[marcalc]

haha That's it! Thank you! =)