Privacy Policy

Last updated: November 3, 2026

Rensa ("the app") measures and cleans up the disk of your Mac. It is built so that nothing about your files ever leaves your Mac. We do not collect, store, share or sell any personal data.

What the app reads

• Names, sizes and dates of files and folders on the disk or folder you choose, to show where your space goes. Rensa does not read the contents of your documents.
• The first few bytes of files without an extension, to tell you what kind of file they are (for example "ZIP archive" or "AI model weights"). This happens on your Mac and is never stored.
• File contents, only for Duplicates, and only when you start it. Files are compared on your Mac to find exact copies. Cloud-only files are skipped and never downloaded.
• Installed apps: their names, versions, developers and sizes, to show apps with their data and leftovers.
• Protected folders such as Desktop, Documents, Mail or Messages only if you allow it in macOS. You can turn access off at any time in System Settings › Privacy & Security.

What the app stores

Rensa keeps, inside its own sandbox container on your Mac:

• a small summary of each scan (folder sizes, not file names inside them) so it can show what grew since last time;
• a list of what you removed and where it went in the Trash, so you can put it back;
• your permission to read the disk you chose, as a macOS bookmark.

Deleting the app removes all of it.

What leaves your Mac

Nothing. Rensa has no network access, so it cannot send anything anywhere. There is no account, no crash reporting of our own and no third-party code that collects data. If you have chosen to share analytics with Apple in System Settings, Apple may receive anonymous crash reports covered by Apple's privacy policy.

Changes to your files

Rensa only moves items to the Trash, or frees the local copy of a cloud file, after you review them and confirm. You can put moved items back from Recently Removed in the app, or from the Trash, until you empty it.

Price and purchases

Rensa is completely free. It has no in-app purchases, so no payment details are ever involved.

Children

Rensa does not collect data from anyone, including children.

Changes to this policy

If this policy changes, the new version will be posted on this page with a new date.

Contact

Joel Roos Studio, Sweden. Questions? Email support@joelroos.studio.