CADDaddy: CAD Viewer

Open STEP, STL, DWG, IGES files anywhere. View in AR. No account. No subscription. Pay once, use on iPhone, iPad and Mac forever.

CADDaddy is a fast, native 3D CAD viewer for iPhone and iPad. Open STEP, DWG, DXF, FBX, 3MF, PLY, STL, IGES and OBJ files in seconds — no account required, no subscription, no features locked behind a second paywall.

Built natively for Apple Silicon, CADDaddy renders complex assemblies smoothly using Metal. Every part keeps its colour. Every gesture works the way you'd expect on iPhone and iPad.

WHAT YOU CAN DO

• Open files from Files, Mail, AirDrop, or any share sheet
• View assemblies in full colour where each part renders individually
• Switch between shaded, wireframe, and solid display modes
• Toggle between perspective and orthographic projection
• Slice through any model with section planes on X, Y and Z axes
• Measure point-to-point distances with vertex snapping
• Export to STL, GLB or USDZ
• View any USDZ export in AR — place a model on your desk and walk around it

WORKS THE WAY AN iOS APP SHOULD Native touch gestures. One-finger orbit, two-finger pan, pinch to zoom. Every control is built for thumbs and fingers, not retrofitted from a desktop UI.

VIEW IN AR Tap to send any model to AR Quick Look. See your part at full scale on the floor, on your desk, in your workshop wherever you need to check it before you commit.

ONE PURCHASE. THREE PLATFORMS. Buy once and CADDaddy unlocks on iPhone, iPad and Mac. No account, no cloud sync, no analytics — your files stay on your device.

WHO IT'S FOR Engineers checking geometry on the go. Clients reviewing a design without needing a CAD licence. 3D printing enthusiasts inspecting files before they slice. Machinists verifying a part before they cut.

If you've ever tried to open a CAD file on your iPhone and hit a login screen, a subscription prompt, or a crash, CADDaddy is the app you were looking for.