I Built an App That Turns Phone Photos into 3D Models, and Nothing Leaves My Wi‑Fi

Description and use

ThreeD app turns phone photos into 3D models locally, avoiding cloud uploads by using Apple Object Capture, Hunyuan3D, and Ollama.

Create 3D models from phone photos locally without uploading data to the cloud.

The workflow enables fully local 3D reconstruction from phone photos, preserving privacy and eliminating cloud dependencies.

1. Open ThreeD app and choose capture mode (Photo set, 4 photos AI, 1 photo AI).
2. Capture photos using guided grid or auto‑capture; phone checks sharpness, exposure, contrast, overlap, and background segmentation.
3. Phone uploads validated photos to the Mac via HTTP/Bonjour.
4. Mac runs Apple Object Capture for Photo set or ComfyUI/Hunyuan3D for AI modes, and Ollama for photo quality tips.
5. Mac builds and cleans the 3D model, then serves it to the phone.
6. Phone displays model in Gallery, 3D viewer, or AR; users can share via link, file, or AR file.

The photos never left the house, and there was no sign‑up, no upload and no credits to buy.

Apple Object Capture on them and you get the object's real shape with its real colours.

The phone also cuts the object out of the background, with Apple Vision on iPhone and ML Kit Subject Segmentation on Android.

The viewer is Google's <model-viewer>, but it's served by the Mac rather than a CDN, so it works with no internet at all.