Musou

Updated October 30, 2026

Privacy Policy

Musou collects nothing about you. No account, no analytics, no tracking, no ads.

What the app does on your Mac

The one time it goes online

If you purchase a Supporter or Patron licence and enter your licence key, Musou checks that key with Polar (polar.sh), our merchant of record. It sends the licence key, a random installation ID, your Mac model name, and the stored activation ID, and periodically re-validates status and expiry. It stores only whether the key is valid, its tier, and its expiry date. Polar's response may include order metadata; the app immediately discards personal details and never stores or forwards them. Every free feature and the built-in 14-day Supporter trial work 100% offline.

When you buy

You pay on Polar's checkout page in your browser, not inside the app. Polar handles your payment and billing details under its own privacy policy: polar.sh/legal/privacy. We see only standard seller order records in Polar (such as your email address and tier purchased) and use them solely to deliver your licence, answer support questions, and process refunds.

If you share

“Share” opens macOS's native share sheet with a ready-made post; nothing is sent unless you choose to send it.

Children

Musou is not directed at children and collects no personal data from anyone.

Changes

If this policy changes, the date at the top of this page will be updated and any material changes will be noted here.

Contact

Musou Support (via your Polar receipt or inside Settings › Supporter)