Build CAD
3D Modeling Privacy Policy
3D Modeling works on your device. It has no accounts, no analytics, no advertising and no servers of its own, and Build CAD receives none of your data. Data leaves your device only when you send it somewhere yourself: to your own 3D printer, to a cloud or CAD service you set up, or to another device on your Wi-Fi.
At a glance
| Data | Where it is kept | Sent to us? |
|---|---|---|
| Your projects, models, drawings and renders | On your device | No |
| Files you import or export (OBJ, STL, 3MF, STEP, glTF, USDZ, PLY, PDF, DXF, video and others) | Where you choose to save them | No |
| Printer access codes, API keys and service passwords you enter | On your device, encrypted with the Android Keystore | No |
| App preferences | On your device | No |
| Pro purchase and subscription status | Google Play | No. We never see payment details |
| Usage analytics, crash reports, advertising identifiers, location | Not collected | No |
What 3D Modeling stores on your device
Your projects, their saved versions, your Object Library and your settings live in the app's private storage. Android's own backup may include them, depending on your device settings. Picture thumbnails are a cache and are not backed up.
If you connect a 3D printer, a WebDAV server, Onshape or Autodesk, the access code, API key or password you type is stored on the device, encrypted with a key held by the Android Keystore. It is never included in backups and cannot be read off the device.
You can delete a project in the app at any time. Uninstalling 3D Modeling deletes all of its data from your device.
Files you open, import and export
Models, scans, photos and other files are read only when you pick them with the system file picker or share them to the app. Exports are written where you choose, or handed to the share sheet. 3D Modeling does not upload them anywhere unless you use one of the features below. Exported files contain your design, including names and notes you entered, so review them before sharing.
When data leaves your device
Every network connection starts with something you do, and goes to a destination you choose:
- 3D printing. To find printers, the app looks for them on your local network. When you print, it sends the sliced file and printer commands, with the printer's API key or access code, to the printer you selected (OctoPrint, Moonraker/Klipper, PrusaLink, Duet or Bambu Lab).
- Sending to CAD and cloud storage. When you use Send to CAD or version sync, the exported files or project versions go to the WebDAV server, Onshape account or Autodesk account you set up, using the credentials you entered.
- Wi-Fi handoff. When you share to another device on your Wi-Fi, the app runs a small temporary server on your device. Whoever opens the link, which contains a random token, can download that export, and can send a file back to you. The server offers only the export you chose to share.
- Model Library. Browsing and downloading free models contacts Poly Haven, or the Smithsonian Open Access service with your own api.data.gov key if you add one. Only your search text and the files you request are exchanged.
Those services, printers and servers are run by you or by third parties, not by Build CAD, and their own privacy policies apply.
Purchases
3D Modeling Pro is sold through Google Play Billing. Google processes the payment, keeps the receipt and manages renewals and cancellations. The app only asks Google Play which Pro products you own. It never receives your name, card or billing address. The Google Privacy Policy applies to purchases.
Permissions
- Internet and network state: for the features listed above, and to show the Wi-Fi address for a handoff.
- Wi-Fi multicast: to discover 3D printers on your local network.
- Notifications and foreground service: to show progress while a render or video export you started keeps running in the background.
3D Modeling does not ask for location, camera, microphone, contacts or storage access. Files go through the system picker.
Analytics and advertising
3D Modeling contains no analytics, telemetry, crash-reporting or advertising libraries, and does not collect device identifiers. If the app crashes, any report goes to Google only through the reporting built into Android or Google Play, under your own settings.
Children
3D Modeling is a design and engineering tool and is not directed at children under 13. We do not knowingly collect personal information from anyone, including children.
Your choices
- Delete any project, or all of them, from the project library.
- Remove a saved printer at any time; its stored access code or API key is deleted with it.
- Manage or cancel a Pro subscription in Google Play under Payments & subscriptions.
- Uninstall the app to remove all its data from your device. Purchase records stay with Google Play.
Changes to this policy
If 3D Modeling adds a feature that handles data differently, this page will be updated and the effective date above will change.
Contact
Questions about privacy in 3D Modeling: Build CAD, dev@polymath.la. Terms of Use: tos.vidanimate.co.