Last updated: 6 November 2026
Sumi for Supernote on iPhone and iPad (the “app”) displays Supernote notebooks (.note) and annotated PDFs (.mark with their original PDF) on your device. This policy explains what data the app handles. In short: the developer collects no data at all.
Daniel Schäfer, Germany. Contact: sumi@schaefer-dev.de
If you choose to connect Dropbox, you sign in on Dropbox’s own page and grant the app read-only access. The app then communicates directly between your device and Dropbox to:
The app never changes, uploads or deletes anything in your Dropbox. The sign-in credentials (OAuth tokens) are stored in the iOS Keychain on your device by the official Dropbox SDK. Your use of Dropbox is governed by Dropbox’s privacy policy.
To work offline and reopen documents quickly, the app keeps on your device only:
Saved documents are excluded from iCloud backup. Handwriting recognition uses Apple’s on-device Vision framework; your handwriting never leaves the device for recognition.
You can remove downloaded documents at any time in Settings → Remove Downloaded Documents. Disconnect Dropbox removes the account’s sign-in, recents, favorites, library folder and downloaded documents from the device. Deleting the app removes all of its data. None of these actions affect the files in your Dropbox.
Documents you open from the Files app, from another app or from the bundled samples are copied into a temporary area for viewing and are not kept after the session.
If you email support, your message and email address are used only to answer you and are not shared.
This page is hosted on GitHub Pages. The website (not the app) uses Cloudflare Web Analytics, which counts page views without cookies and without identifying visitors, and serves its fonts itself. Details are in the website’s privacy policy.
The app does not knowingly collect any personal information from anyone, including children.
Changes to this policy will be published on this page, with an updated date.