Privacy Policy

Updated 11 November 2026

Who we are

Ye Olde Messenger is run by Mather Software Ltd, registered in England and Wales, which is the controller of your personal data under UK GDPR. Contact us at support@mathersoftware.com.

What we collect

Your email address (and your name, if you sign in with Apple) to sign you in, and the date you agreed to these terms. Your conversations: the messages you send and the replies. How many messages you sent today, and when you last used the app. Whether you have a Pro subscription and when it ends (not your payment details, which stay with Apple). If you turn on the daily letter, a notification token for your device.

How the AI sees your messages

To write a reply or a daily letter, the recent messages of that conversation are sent to Anthropic, which runs the AI model; for a Historian's note, the one message it is about. Anthropic processes them to produce the text and does not use them to train its models. Don't put anything in a chat that you wouldn't want processed this way, such as passwords or health details.

Who we share it with

Clerk (sign-in), Convex (database and servers), Anthropic (the AI model that writes the replies), RevenueCat and Apple (subscriptions: an account identifier and purchase status), Expo (app updates, and delivering notifications, which carry the opening lines of a daily letter) and Sentry (crash reports: device model, OS version and what the app was doing when it crashed, never your account details or messages). If you report a message, a copy of it is kept with your report so our support team can review it. We don't sell your data or show ads.

How long we keep it

Until you delete it. You can delete a conversation from its menu, and deleting your account erases your conversations, reports and sign-in identity straight away. Crash reports aren't linked to your account and Sentry deletes them within 90 days.

Children

Ye Olde Messenger is not directed at children under 13, and you must be old enough to consent to data processing in your country to make an account.

Your rights

Under UK GDPR you can ask for a copy of your data, ask us to correct or delete it, or object to how we use it. Email support@mathersoftware.com. You can also complain to the Information Commissioner's Office at ico.org.uk.

Questions: support@mathersoftware.com