@beriaru's post on Artfol

Is there a (free) good 3d sculpting/modeling app? I tried one once but it was so limited. My pc probably can't run a program and I can't draw things with mouse, so... Any good free app? :3May 3, 2021
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forger if you’re a mobile fan
Yep blender
And for really quick blocking in for buildings and stuff you can use Sketchup
Normally it's not free but you can find an older version (I think version 8?) Uploaded online as freeware
Blender
Or Sculptris

I have very little usage with these, but I hear they're very good for 3d modeling! Especially Blender