Automatic capture
One photo every few seconds or every few meters walked, with the screen always on and a tap of feedback for each shot.
Free · Android · no account, no ads
Walk around it. Get it in 3D.
Vox4D turns your phone into a 3D scanner. It takes sharp, overlapping photos while you walk, tags each one with its GPS position, and sends them to your own processing server, which gives you back a textured model, a point cloud and, for ground surveys, an orthophoto.
The first version is on its way: the page updates itself when it is out.
How it works
- 1
Capture
Choose manual, timer or distance mode and walk slowly around the object or across the area. Vox4D takes the photos and saves the position of each one.
- 2
Check
Look at the photos, delete the blurry ones and see on the map where each shot was taken, with its GPS accuracy.
- 3
Process
With one tap the photos go to your NodeODM server, on your PC or on a rented machine. The app follows the progress while you do other things.
- 4
Use the model
Download the textured 3D model, the point cloud and the reports, or export photos and positions for Pix4Dmatic, Metashape or RealityCapture.
What it can do
Every photo has its position
Latitude, longitude, altitude and accuracy at the moment of the shot, with a live indicator that turns green, amber or red.
Your server, your data
The photos go only to the processing server you choose. No account, no cloud of ours, no tracking.
Map of the shots
The path you walked on OpenStreetMap, with a circle showing how precise each position is.
Open export
A zip with the images, geo.txt for OpenDroneMap and a CSV of positions that the main photogrammetry programs can read.
Thirteen languages
The app and this site speak English, Italian, Spanish, French, German, Portuguese, Turkish, Russian, Ukrainian, Arabic, Chinese, Japanese and Korean.
The processing server
The 3D reconstruction is heavy work, too heavy for a phone. Vox4D uses NodeODM, the free engine of OpenDroneMap: on any PC with Docker, one command is enough.
docker run -d -p 3000:3000 opendronemap/nodeodmThen in the app, in Settings, enter the address of the PC (for example http://192.168.1.20:3000) and tap Test the connection. 16 GB of RAM or more is recommended.
Updates
Vox4D is not on the Play Store: new versions come straight from GitHub, and the app tells you when there is one.
- At startup the app checks whether a newer version exists. You decide whether and when to install it.
- Before installing, the app checks the SHA-256 fingerprint of the file: only the build published by the project gets through.
- Every version has its notes in the changelog, and all the APKs stay available in the public releases repository.
Support the project
Vox4D is free and without ads. If it is useful to you, a donation helps pay for the time and the tokens it takes to improve it.
Thanks
Vox4D stands on the work of many people and open projects.
People
The people who give ideas and test the app will be listed here.
Donors
Nobody yet: your name could be the first one here.
Open services
- OpenDroneMap / NodeODM AGPL-3.0
- OpenStreetMap ODbL
Open-source libraries used by the app
- camera BSD-3-Clause
- geolocator MIT
- flutter_map BSD-2-Clause
- latlong2 Apache-2.0
- archive MIT
- share_plus BSD-3-Clause
- http BSD-3-Clause
- shared_preferences BSD-3-Clause
- path_provider BSD-3-Clause
- uuid MIT
- wakelock_plus BSD-3-Clause
- package_info_plus BSD-3-Clause
- open_filex BSD-3-Clause
- url_launcher BSD-3-Clause
- crypto BSD-3-Clause
Tokens spent
Vox4D is developed with the help of Claude, by Anthropic. Here is how much it has taken so far, counted from the development logs.
- Tokens in total
- 7,889,936
- Estimated cost
- $6.14
- Tokens written by Claude
- 82,950
- Work sessions
- 1
From September 24, 2026 to September 27, 2026, updated on September 27, 2026. The cost is estimated at Anthropic API list prices. The total also counts the text re-read from the cache at every step, which costs a tenth of new text.
Questions
Does it work on iPhone?
Not yet. The app is written in Flutter and the iPhone version is planned, but it needs a Mac to be built and published.
Do I need a drone?
No. Vox4D uses the phone camera: objects, rooms, facades, small areas of ground. For large areas a drone is still the best choice.
How precise is the model?
The shape is as good as the photos: sharp, well lit and overlapping by about 70%. The position on the map depends on the phone GPS, usually 3–5 meters, so it is not a surveying instrument.
Where do my photos go?
They stay on the phone until you send them to the server you configured yourself. Vox4D has no servers of its own and collects no data.
Why do I have to install the APK by hand?
Because Vox4D is outside the Play Store. Android will ask you once to allow installation from the browser or the file manager; after that the app updates itself.
Is it related to Pix4D?
No. Vox4D is an independent project inspired by photogrammetry apps such as PIX4Dcatch. It is not affiliated with Pix4D and uses none of its code.