Effective date: July 6, 2026. Presheaf is a visionOS app for opening spatial notebooks, local data files, and user-selected Jupyter servers. This policy describes the data Presheaf handles, where it is stored, and the choices available to you.
If you sign in with Apple, Presheaf may receive your Apple-provided user identifier, name, and email address. Apple may provide a private relay email address depending on your Sign in with Apple choices.
Presheaf uses this information to identify your account, manage signed-in app features, and support account deletion or recovery workflows.
Presheaf can handle notebooks, code cells, cell outputs, data files, images, videos, 3D models, point clouds, Gaussian splats, and spatial metadata that you import or create.
Local content remains on device unless you export it, share it, or connect to a notebook server that processes it.
Presheaf can store user-provided Jupyter server URLs, helper server URLs, discovered server history, and authentication tokens. URLs and preferences are stored locally. Tokens and other secrets are stored in the system keychain.
Presheaf can discover notebook servers advertised over Bonjour on your local network. Discovery is used to show available servers in the app. Presheaf does not use local-network discovery for tracking.
Presheaf connects to remote services only when you initiate a connection, reopen a saved server, sign in, or use a feature that depends on that server.
Remote credential-bearing connections should use HTTPS. Local development and Bonjour-discovered servers may use local HTTP addresses such as localhost, 127.0.0.1, or private-network hosts.
When you connect Presheaf to a Jupyter, JupyterHub, helper, Superset, or other user-provided service, that server may receive the notebooks, code, output requests, tokens, and files needed to perform the requested operation.
Those services are controlled by you or by the service provider you choose. Their handling of your data is governed by their own policies and configuration.
Presheaf does not sell personal information.
Presheaf does not share notebook contents with third parties except when you explicitly connect to a server, export content, use a sharing workflow, or request a hosted feature that requires server processing.
You can remove saved servers, delete imported files, clear local credentials, and sign out from the app. You can revoke local-network permission in visionOS Settings.
If account-backed features are enabled, use the in-app account controls or the support channel below to request account deletion.
Presheaf is not intended to collect personal information from children.
This policy may be updated as Presheaf changes. Material changes will be reflected at this URL, which is the public privacy policy address used for App Store submission.