This is a trial version, there is only one in-app-purchase to unlock everything. The limited features are: - 1 undo/redo - 1 layer - project management (save/load/import/export) - Sculpting tools Clay, flatten, smooth, mask and many other brushes will let you shape your creation. Need hard lines? you will also find some lasso/line/curve cutting tools. - Stroke customization Falloff, alphas, pencil pressure and other stroke parameters can be customized. - Painting tools Vertex painting with color, roughness and metalness. You can easily manage all your material presets as well. - Layers Record your sculpting and painting operations in separate layers for easier iteration during the creation process. Both the sculpting and painting changes are recorded. - Multiresolution sculpting Go back and forth between multiple resolution of your mesh for a flexible workflow. - Voxel remeshing Remesh quickly your mesh to get a uniform level of detail. It can be used to quickly sketch a rough shape at the beginning of the creation process. - Dynamic topology Refine locally your mesh under your brush to get an automatic level of detail. You can even keep your layers, as they will be automatically updated! - Primitive shape Cylinder, torus, triplanar voxel and other primitives can be used to quickly start new shape from scratch. - PBR rendering Beautiful PBR rendering by default, you can upload your HDRI environment. You can always switch to matcap for a more standard shading for sculpting purposes. - Files Save and open glTF, OBJ and STL files. Layers and PBR painting are only kept through GLTF files. - Interface Easy-to-use interface, designed for mobile experience. There is also a lot of customization possible!