3D Modeling on Android and iOS - Sketch3D (2018)
I came across the free version of this 3D modeling app called Sketch3D.
Although it hasn't got alot of tools, it does have enough to help a beginner to get up and running in 3D.
It's got a nice user interface, smooth controls and a decent workflow.
The free version only has 10 undos per scene, you can only model a box and colours can't be changed.
The full version allows unlimited undos, colour changes, expert mode, obj exports and much more.
It would be great if the Developer would add some tools like a vertex mode, some kind of welding, chamfering, a cut or insert edge loop tool, maybe symmetry? But definitely a way to select multiple faces/edges and a redo button!
But give it a shot! It's got potential and is especially good for beginners!
http://sketch3d.in