STEP Viewer vs STP One

STEP Viewer opens STEP (.step, .stp) CAD files in 3D on your phone. No desktop CAD software needed. Everything is free. There are no in-app purchases. Credits only skip the ad; without credits you can still open every file after watching a short ad. Key features * Open .step and .stp files straight from your file manager - just tap the file * Measure your model: a bounding box with all three side lengths, in mm or m * Six fixed views (front, right, back, left, top, bottom), plus pinch to zoom, pan and rotate * Save the converted model as GLB whenever you need it * Large files show the estimated time and memory before conversion starts, and progress while it runs * If a file cannot be opened, the app tells you why instead of failing silently * Available in 12 languages, following your device settings Supported formats * Input: .stp, .step (STEP AP203, AP214) * Output: .glb (glTF Binary) How to use 1. Tap a .step file in your file manager, or open the app and tap the folder icon 2. Wait for the conversion - large files show progress and an estimate 3. Drag to rotate, pinch to zoom, tap the view button to switch sides License This app uses Open CASCADE Technology (LGPL-2.1). https://www.opencascade.com For questions or bug reports, please contact us by email.

STP One opens STEP and IGES 3D drawings right on your phone — and measures them. Open a file and the overall dimensions (W x D x H) appear automatically. Tap two points for the distance. Pick a material and the part weight is calculated instantly from the solid volume (245 built-in materials). - Open STEP (.stp/.step) and IGES (.igs/.iges) 3D files, plus DXF/DWG 2D drawings - Automatic overall dimensions; measure two-point distance, point-to-edge and face-to-face perpendicular distance - Section view (X/Y/Z clipping); assembly parts list with hide/transparent per part - Volume, surface area and weight by material (245 materials) - Export 2D drawings to PDF and share - Touch controls: rotate, zoom, pan - a short guide appears on first launch - Works fully offline - no account, no ads, your drawings never leave the device For engineers, buyers, QC and sales on the factory floor: check a 3D file anywhere, no CAD seat required. Free: one file per day with viewing, overall dimensions and edge highlight, plus 3 free uses of every Pro feature. Pro (monthly or yearly): unlimited files, measurement suite, section view, parts list, weight by material, 2D drawings and PDF share. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel anytime in your App Store account settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://erp.lihaon.co.kr/privacy-stpone