If you absolutely require a completely free 3D workflow with export capabilities, consider using robust open-source alternatives:
If a family member has already purchased Nomad Sculpt on iOS, check if they have Family Sharing enabled. If they do, you may be able to download the app on your own iOS device through their purchased history at no extra cost. Supporting Independent Developers nomad sculpt license key free new
for learning Nomad Sculpt for free.