CAD Assist

CAD Assist is a powerful, 100% offline 3D CAD viewer and parametric editor designed for mechanical engineers, designers, machinists, and 3D printing enthusiasts. Powered by a native OpenCASCADE (OCCT) geometry engine and WebGL rendering, CAD Assist delivers Onshape-grade model visualization directly on your Android device—with zero cloud dependency, total privacy, and instant local performance. Key Features Clean Solid Visualization (B-Rep Rendering) Say goodbye to messy mesh grids. CAD Assist separates analytical B-Rep geometry from display meshes, rendering smooth, shaded faces overlaid with crisp topological boundary edges—giving your models a clean, professional SolidWorks or Onshape look. Multi-Part Assembly Management Effortlessly load complex multi-part STEP assemblies. Tap any component to access instant visibility controls: Hide: Temporarily remove components from view. Only: Isolate a single part for focused inspection. All: Instantly restore visibility across the entire assembly. Context-Aware Dual Selection (Faces & Edges) Intelligent touch raycasting distinguishes between surfaces and curves. Tap a flat or curved Face to inspect surface properties or prepare extrusions; tap a sharp or rounded Edge to apply parametric modifications. On-Device Parametric Editing Perform real-time geometric operations locally on your phone’s CPU. Apply edge fillets, chamfers, and feature modifications using native C++ geometry algorithms without uploading your proprietary files to third-party cloud servers. 100% Offline & Private Your intellectual property stays on your device. CAD Assist processes, tessellates, and renders all 3D files locally without requiring an internet connection or subscription service. High-Performance 3D Engine Auto-Fit Camera: Automatically computes global 3D bounding boxes to center and scale models of any unit size (mm, inches, meters). Fluid Orbit Controls: Smooth touch gestures for pan, zoom, and 360° rotation. 60 FPS Performance: Optimized 1-draw-call rendering pipeline keeps complex models running smoothly on mobile hardware. Supported File Formats STEP Files: .stp, .step (AP203, AP214, AP242) IGES Files: .igs, .iges Who Is CAD Assist For? Mechanical & Industrial Engineers: Review parts and assemblies on the shop floor or on the go. Machinists & CNC Operators: Inspect edge boundaries, hole locations, and part dimensions offline. 3D Printing Hobbyists: Verify STEP geometry before converting to STL for slicing. CAD Students & Professionals: A lightweight, fast CAD viewer that fits in your pocket. Download CAD Assist today and bring professional 3D CAD viewing and editing to your mobile device!

View & Edit All CAD Files STEP, IGES, STL files