Privacy Policy

Last updated: November 15, 2026

Mailkin is a Mac app that translates emails inside Mail. It is built so that your emails and your data stay on your Mac.

In short

• Mailkin does not collect, store or share any personal data.
• Your emails are translated on your Mac and are never sent to us or to anyone else.
• There is no account, no analytics, no advertising and no tracking.

Your emails

To translate an email, Mail gives Mailkin's extension the email's content while you view it. Mailkin translates it on your Mac using Apple's built-in translation, which runs on the device, and hands the translated version back to Mail to show you. The email in your mailbox is not changed.

Mailkin keeps a local cache of recent translations on your Mac so emails open quickly the next time. It stays on your Mac and is never uploaded.

Data stored on your Mac

Mailkin stores its settings (your languages and per-sender choices), the translation cache and the count of free translations used on your Mac, in its own app container and in your Mac's keychain. None of it leaves your Mac, and none of it is sent to us.

Language downloads

Translation languages are downloaded by macOS from Apple. That download is handled by Apple under Apple's Privacy Policy; Mailkin receives no information from it.

Purchases

The one-time purchase is handled entirely by Apple through the App Store. Mailkin only learns whether the purchase is active, so it can unlock unlimited translation. We never see your payment details or your Apple Account.

Contacting us

If you email us, we use your email address and message only to answer you. Questions about this policy: macapps.support@icloud.com.

Changes

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