RE:solid STL & STEP Viewer

E:solid 3D viewer opens working 3D models right on your phone — no cloud, no sign-up, no internet. A file from a messenger, an email or a flash drive opens in one tap and turns with your finger.

📁 FORMATS
• STL — binary and ASCII
• OBJ — together with MTL, so with colours
• 3MF — with part names and colours
• PLY — 3D scanner files, with vertex colours
• STEP, IGES, BREP — real CAD formats, converted right on the device [PRO]
• ZIP — the app finds the models inside and offers them as a list

🛠️ WHAT YOU CAN DO
Anything marked [PRO] unlocks with a one-time purchase; the rest is free forever.

💎 View in Shaded and Rendered modes, with materials: metal, gold, silver, chrome, copper, glass, diamond
🎨 Set a colour for the whole model or for one part — just hold the part on screen
📋 See the parts list with names from the file
📐 Get the model's dimensions
🔬 Technical modes: wireframe, X-ray, ghosted [PRO]
👁️ Hide the parts that are in the way, or keep just one on screen [PRO]
🔩 Take an assembly apart in order: whatever is covered comes off later [PRO]
✂️ Cut the model with a plane along any axis and see what is inside [PRO]
📏 Measure distances, angles and diameters with snapping to vertices, and wall thickness with a single tap [PRO]
⚖️ Calculate volume, surface area and weight — plastics, gold 14K and 18K, silver 925, steel, copper, aluminium [PRO]
💰 Enter a price per gram and see the cost of the piece [PRO]
💾 Save what you see as STL, OBJ or 3MF — which also makes it a STEP → STL converter [PRO]

👤 WHO IT IS FOR
Jewellers who need the weight of a piece before casting. Printing shops checking a model before the job. Engineers and designers who need a look at a part or an assembly without a laptop. Anyone who was sent an STL and told "take a look".

⭐ RE:SOLID PRO
Basic viewing is free and ad-free: STL, OBJ, 3MF, PLY, archives, view modes, materials, colours, the parts list, dimensions.

A one-time purchase, no subscription, unlocks: STEP, IGES and BREP conversion, section analysis, all measurements, weight, surface area and cost, technical view modes, exploded view, hiding and isolating parts, saving to STL, OBJ and 3MF.

Three trial sessions come before the purchase: each one unlocks every Pro tool until you close the app, and is spent only when you activate it yourself.

✈️ OFFLINE
Everything is computed on the device. Models are never uploaded — even heavy CAD assemblies are converted locally. The app works on a plane, on the shop floor and in the field.

This is a viewer, not an editor: you cannot model in it.