ScanPDF vs Stairstep

ScanPDF turns your iPhone or iPad into a fast, simple document scanner. SCAN IN SECONDS Point your camera at any document. ScanPDF automatically detects edges, corrects perspective, and crops perfectly. MULTI-PAGE PDF Scan receipts, business cards, contracts, invoices, or ID cards. Combine multiple pages into a single PDF file. SHARE INSTANTLY Send your scanned PDF via email, AirDrop, Messages, or any app. No extra steps needed. SIMPLE BY DESIGN No bloat, no clutter. ScanPDF focuses on one thing — turning paper into PDF, fast. PERFECT FOR - Scanning receipts and invoices for expense tracking - Digitizing business cards and contracts - Tax document preparation - Going paperless at work or home Open. Scan. Share. That's it.

Stairs views STEP files. Open a model and inspect it in 3D — orbit, pan, and zoom, with a reference grid and a scale bar to keep track of size. Drag to orbit the model and scroll or pinch to zoom; the scale bar updates to match. The toolbar fits the model back into view and reveals an inspector that reports the geometry — vertices, triangles, materials, and overall dimensions.