3D File Viewer vs STL Workshop

PrintPeek is a fast, private viewer for STL, OBJ, 3MF, PLY, and ZIP 3D model files. Open a model from Files, Mail, Safari, AirDrop, or the share sheet, then inspect it with a clean 3D preview. PrintPeek is designed for short maker workflows: preview the model, check the basic details, export a clean image or mesh format, and move on. Main features: - Preview STL, OBJ, 3MF, PLY, and supported models inside ZIP files - Rotate, move, and scale models with simple gestures - Switch between solid, edge, and transparent display modes - Use front, top, side, and isometric view presets - Check bounds, file size, face count, surface area, and volume - Export PNG previews, OBJ, DAE, and DXF files - Save PNG previews to Photos - Works locally with no account, ads, or cloud upload PrintPeek is intentionally focused. It is not a CAD editor, slicer, mesh repair tool, or printer control app. It is built for quickly checking and sharing 3D model files on iPhone and iPad. The free version opens smaller files. PrintPeek Pro is a one-time unlock for larger files and export features. ----- Terms of service: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

STL Workshop is a 3D model viewer and editor built for 3D printing. IMPORT • STL (binary, ASCII, colors), OBJ, PLY, 3MF, USDZ • From Files, Mail, AirDrop — open any model in seconds VIEW • 7 render modes: shaded, edges, wireframe, x-ray, normals, overhangs, wall thickness • Interactive section cut, layer preview, exploded view • Studio and HDR lighting, realistic materials ANALYZE • Full diagnostics: watertightness, manifold topology, normals, shells • Dimensions, volume, surface, weight and cost by material and infill • Estimated print time, bed stability, center of gravity • Precise measurements: distance, angle, diameter PREPARE • Automatic repair: filled holes, fixed normals, removed debris • Auto-orientation minimizing overhangs on import • Scale, rotate, mirror, lay flat, automatic base • Hollowing with drain holes (resin), drilling and booleans, embossed or engraved 3D text • Grid duplication, predefined printer beds EXPORT • STL, OBJ, USDZ and augmented reality (AR Quick Look) • HD transparent captures, 360° GIF • Direct upload to OctoPrint or WebDAV servers • Siri Shortcuts: convert to USDZ, repair an STL Units in millimeters. No ads, no data collection.