The productive notes app A space to capture, write, and organize your notes, tasks, images, and ideas.

Saturn is a Markdown notes app for Mac. It keeps every note as a plain .md file in a folder you own — your vault — and syncs that folder through your own iCloud Drive, with no account. It requires macOS 15 (Sequoia) or later and costs $29 once, after a 14-day free trial.

Yes. Saturn opens an existing folder of Markdown as it is and reads the conventions it already uses: YAML frontmatter, [[wiki-links]] with aliases, tags, - [ ] tasks, and JSON Canvas files. Opening a vault changes nothing on disk: Saturn writes a file only when you edit that note, and keeps every property it doesn't recognise exactly as written.

Saturn stores notes as ordinary Markdown files in a folder you choose — by default a folder in iCloud Drive, though any folder works, including a local one. You can open, edit, back up or version-control those files with any other tool while Saturn is running; it watches the folder and picks up changes within about a second.

Saturn syncs through your own iCloud Drive. Your vault is a normal folder there, so it moves between your Macs the way any other iCloud folder does — no Saturn account, no sign-in, and no server of ours in the path. Notes stay readable and editable with no network at all, and sync again when you're back online.

Yes. Saturn has no analytics, no telemetry and no crash reporting, and it never uploads your notes anywhere. It goes online only to check for its own updates, to confirm a purchase once, and to load a web page you chose to save as a link. Your notes travel only through your own iCloud Drive.

Saturn costs $29 as a one-time purchase, after a 14-day free trial that needs no card. $29 is a launch price that will rise to $49; buying now locks in the lower one. It is not a subscription: every 1.x update is free for at least 5 years, security fixes included.

When Saturn's free trial ends, the app becomes read-only rather than locking you out. Every note stays open, searchable, exportable and copyable; what stops is writing new text. Your notes are Markdown files in your own folder either way, as reachable as they were before you installed it.

Yes. One Saturn licence covers one person on all of their Macs. On a second Mac signed into the same iCloud account, the licence arrives with the vault, so there is nothing to type in.

Saturn requires macOS 15 (Sequoia) or later and runs natively on Apple silicon and Intel Macs as a universal app. It is notarized by Apple and updates itself. An iPhone and iPad version is in development.

There are three ways to get a Saturn licence back, and none needs us. On another Mac, sign in to the same iCloud account and open Saturn: the licence travels with your vault. If you kept the licence file from your purchase email, choose it in Settings › Licence › Open Licence File… in Saturn. Or search your inbox for the purchase email, which carries the licence. Still stuck? Write to support@saturnnotes.com from the address you bought with and we'll reissue it.

Email support@saturnnotes.com — a person reads every message, usually the same day. Say what happened and what you expected; a screenshot helps. Whatever has gone wrong in the app, your notes are Markdown files in your own folder, readable in any editor.

Yes. Saturn has a 30-day refund policy, no questions asked: email support@saturnnotes.com within 30 days of buying and you get your money back.