3DC.io is described as 'is the leading App for 3D design on mobile devices and tablets' and is an app in the Education & Reference category. There are five alternatives to 3DC.io for Android, Android Tablet, iPad, iPhone and Windows. The best alternative is Microsoft 3D Builder, which is free. Other great apps like 3DC.io are Polydust (Paid), Spacedraw (Freemium), d3D Sculptor (Freemium) and SDF 3D (Freemium).
d3D Sculptor is a digital sculpting tool that combines 3D modeling, texturing and painting. d3D offers tools to push, pull, extrude, move, rotate, stretch, or otherwise manipulate a digital object as if it were made of a real-life substance such as clay.