STP One vs Cadaclysm

STP One is a drawing viewer built for the shop floor: open STEP and IGES 3D files and 2D drawings (DXF) right on your phone. The overall size (W×D×H) appears as soon as a file opens, and measurement, section, parts and weight are all in one app. ■ 3D viewing · Open STEP (.stp/.step) and IGES (.igs/.iges) · One finger to rotate, two fingers to pan and zoom, [Fit] to recenter · Overall dimensions shown automatically, plus approximate volume and surface area · Edge highlight: normal → bold → hidden ■ Measurement (Pro) · Point-to-point distance with ΔX · ΔY · ΔZ · Point→edge perpendicular distance · Face↔face distance between two parallel faces, with the angle between them ■ Section & parts (Pro) · Section along X/Y/Z — move the slider to cut the model and see inside, flip direction · Assembly parts list — each part cycles visible → transparent → hidden ■ Weight (Pro) · 245 built-in materials (steel sheet, stainless steel, non-ferrous metals, spring wire, injection resins, rubber and more) · Pick a material and get the weight from the model volume instantly ■ 2D drawings (Pro) · Open 2D drawings (DXF) — one finger to pan, two to zoom · Export a print-ready A4 PDF and share it by message or e-mail ■ Handy extras · Reopen your 5 most recent files · Open drawings sent from other apps · 7 languages: 한국어 · English · 中文 · Español · Tiếng Việt · हिन्दी · नेपाली ■ Private, on-device processing · Drawing viewing and calculations run on your device; drawings are not uploaded automatically · Your original files are never modified · No sign-up, no ads, no internet connection needed to view drawings ■ Free and Pro · Free: 1 file per day — 3D view, rotate, overall size, edge highlight · Pro subscription (monthly/yearly): unlimited files + measurement, section, parts, weight, 2D drawings and PDF sharing · Every Pro feature can be tried 3 times for free before you subscribe · Subscriptions renew automatically unless cancelled at least 24 hours before the end of the period; manage or cancel anytime in your store account settings Whenever you need to check a drawing in manufacturing, design, sales or quality, it is ready the moment you install it. Developed by LIHAON Co., Ltd., an automotive parts manufacturer. Optional ERP feedback lets existing LIHAON employees verify their employee ID/name and submit request text, comments and app/device details to the company ERP. Drawings are not attached automatically. Reading drawings requires no employee account. Subscription validation/restoration uses the internet. Privacy: https://erp.lihaon.co.kr/privacy-stpone EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Cadaclysm opens real CAD files on your iPhone and iPad: the exact B-rep geometry inside a STEP, IFC, 3DM, IGES, SAT or BREP file, read and meshed on the device itself. Nothing is uploaded, no account is needed, and it works with no network at all. FORMATS • STEP (.step, .stp) — AP203, AP214, AP242 and the other schemas ship inside the app • IFC (.ifc) — IFC2x3, IFC4 and IFC4x3, with every element's property sets • 3DM (.3dm) • IGES (.iges, .igs) • ACIS (.sat) • BREP (.brep, .brp), as written by OCCT • OpenSCAD (.scad) — evaluated on the device OPEN A FILE FROM ANYWHERE Pick a file from the Files app, including iCloud Drive and other cloud storage, or send it to Cadaclysm from the Share sheet of Mail, Messages, WhatsApp or any other app. A model someone sends you is two taps away. BUILT FOR BIG MODELS The reader is written in Rust and runs natively on your device. Assemblies with thousands of parts open with a live progress bar, and a memory budget keeps the largest ones on screen at reduced detail instead of running out of memory. Level of detail follows the camera: fine where you look, coarse where you don't. A TOUCH CAMERA THAT STAYS OUT OF THE WAY One finger orbits. Two fingers pan and pinch at the same time. Double-tap frames the whole model. Tap an axis on the triad for a front, top or side view in parallel projection, tap it again for the far side. BROWSE THE PARTS A translucent parts tree slides over the model without hiding it. Expand assemblies, tap a part to select it, frame it, isolate it, or hide whole subtrees with one tap. Search with plain names or with filter expressions (name, type, layer, properties). Every part opens a details panel with its properties — for IFC, the full property sets from the file. SEE THE GEOMETRY, NOT JUST THE SHADING Toggle four layers independently: shapes, edges, curves and isocurves. Give each wire kind its own colour or let it follow the part's colour. Pick a background, turn the grid on or off, and switch a Y-up model (a game-engine export) to show the right way up. TUNE IT FOR YOUR DEVICE Render scale, anti-aliasing, half-precision geometry and detail-while-moving are all adjustable, so an older iPhone stays smooth and an iPad Pro shows everything. SHARE A PICTURE Export the current view as a high-resolution PNG with a transparent background, rendered well beyond the screen's size with crisp edges, and share it from the Share sheet to any app. KNOW WHAT YOU OPENED The document panel lists the file, its reader, what it contains, what the scene was built from, the file's own properties and the reader's diagnostics — the same words the desktop tools use, so a problem can be reported precisely. PRIVATE BY DESIGN Cadaclysm never sends your files anywhere. There are no accounts, no ads and no analytics, and it collects no data. The models on your device stay on your device. Cadaclysm is built on the Cadaclysm geometry library, the same readers, mesher and B-rep kernel that power its desktop, web and game-engine integrations. Questions, models that will not open, ideas: join the Discord from the About screen. Screenshots show a quadcopter assembly built with the Cadaclysm kernel, sample models from NIST's MBE PMI test cases, and the OpenSCAD examples (CC0). ACIS is a trademark of Spatial Corp. and Open CASCADE (OCCT) of Open Cascade SAS; other product names belong to their owners. Cadaclysm is not affiliated with or endorsed by any of them: the names only say which files it reads.