This policy covers Curvelet on the web, iOS, Android, macOS and Windows.
What the app collects
Nothing. The app has no accounts, no analytics, no advertising and no tracking, and it does not send what you type, draw or photograph anywhere.
Where your work is kept
Your expressions, graphs, geometry, worksheets, settings and saved graphs are stored on your device, in the app’s own storage. Deleting the app (or clearing the site’s data in a browser) deletes them.
Handwriting and photos
When you write math by hand or choose a photo, the app reads it on your device. The drawing or photo is not uploaded or stored by the app. Choosing a photo asks for access to your photos or camera only at that moment.
Share links
When you share a graph, the app puts the graph itself, compressed, into the link after a #. The part after # is not sent to any server when the link is opened, so only people you give the link to can see the graph. Downloaded files stay where you save them.
The symbolic math engine
Exact answers come from SymPy running inside the app (through Pyodide). The engine ships with the app; on the web it is downloaded once from the same site as the app and kept for offline use.
Children
The app is suitable for all ages and collects no personal information from anyone, including children.
Changes
If this policy changes, the new version will be posted here with a new date.
