RE:solid 3D Viewer is a fast, intuitive tool for professional 3D model visualization and analysis right on your mobile device. For engineers, designers, 3D-printing enthusiasts and architects — a comfortable way to work with the most popular 3D formats.
📦 Format support
The app works with the main industry standards:
• STL: the most popular 3D-printing format (binary and ASCII).
• OBJ: materials and colors from a .mtl file. Select .obj and .mtl together in the file picker — colors apply without an extra step.
• 3MF: the modern additive-manufacturing format, with colors.
• STEP (.step, .stp) [PRO]: view complex engineering geometry with high precision.
• ZIP: archives open without unpacking. Several models inside? The app shows a list, or opens them all at once.
🔓 Free and RE:solid Pro
Viewing is free forever: STL, OBJ, 3MF, ZIP archives, Rendered mode, materials, colors, dimensions and all controls.
Engineering tools marked [PRO] unlock with a one-time purchase — no subscription, yours forever.
Before buying, 3 free trial sessions give full access to every Pro tool.
✂️ Section analysis [PRO]
Cut the model along X, Y, Z or perpendicular to your line of sight — look inside the structure from any angle, CAD-style.
Hatched cross-section with a black outline, separate colors for each body in an assembly, and precise keyboard input for the plane's position.
📏 Smart Snap measuring [PRO]
Take precise measurements in one tap:
• Ruler: straight-line distance and XYZ-axis offset.
• Smart snapping: automatic detection of the model's corners and vertices.
• Radius & diameter: three points on a circle give you its parameters instantly.
• Angles: between the model's faces.
• Wall thickness: one tap on a surface shows the material thickness at that point.
• Measurement history: every measurement in the session, copied to the clipboard. Units in mm or inches.
⚖️ Weight & volume calculation [PRO]
Estimate a part's mass instantly:
• Real-time volume calculation; hidden parts are excluded from the weight.
• Preset densities for popular plastics (PLA, PETG, ABS, PA12-CF nylon).
• Metals: steel, aluminium, copper, 925 silver and gold (14K, 18K).
💾 Save to STL [PRO]
What you see is what gets saved: a single part, an assembly without the clutter, or several files merged into one. Works with any format the app opens — making it a STEP-to-STL converter too.
🧩 Working with assemblies
• Split into bodies: an STL that looks like one solid chunk splits itself into separate parts — even if the format stores no structure at all.
• Hide / isolate a part [PRO]: press and hold a part of an assembly to hide it, or keep only it on screen.
• Exploded view [PRO]: pull complex assemblies apart with a slider.
🛠 Professional viewing tools
• Rendered (realistic) and Shaded (matte) modes — free.
• Materials: gold, silver, chrome, copper and glass with physically correct lighting.
• Technical modes [PRO]: Wireframe, X-ray, Ghosted, Technical.
• Orthographic and perspective cameras — undistorted or with realistic depth.
• Navigation cube: jump between standard views instantly.
🌐 Fully offline
Every format, STEP included, is processed right on the device — no data ever leaves the phone. Works offline from the very first launch. Most viewers send STEP files to the cloud for conversion — RE:solid never does.
🚀 Built for mobile
• Speed: opens large models with ease (100+ MB).
• Zen mode: hide the interface with a double tap to focus on the model.
• Lighting joystick: control the light in real time.
• Haptic feedback: sliders and mode switches respond to touch.
• Settings: background color, shadows, grid.
• Languages: Ukrainian and English.
RE:solid 3D Viewer is your portable engineering desk. View, measure, analyze and save 3D models anywhere, anytime.
Recent changes:
• Parts list: every part by name, like a CAD tree. Names come from the file — STEP, OBJ, 3MF
• The list is a bottom sheet, so the model stays visible and you can rotate it while you work
• A STEP part no longer falls apart: a bearing made of several shells hides as one piece
• Hidden parts can no longer be picked by touch, and no longer show up in section cuts
• Top buttons regrouped: view and material next to the gear, tools in the row below
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