All your designs and projects are stored locally on your iPad.
If you have a Business license, then you can export your projects to third-party cloud apps in all supported formats.
If you have a Standard license, then you can export your projects to SHAPR, STEP, IGES, OBJ, USDZ, DXF, and high-quality STL; you can also save your projects as images.
If you use the free, basic version of Shapr3D, then you can only export your projects to low-quality STL.