Mail~ Privacy Policy
In one paragraph
Mail~ is an email app for iCloud Mail. Your mail travels only between your devices and Apple's servers; the one exception is an unsubscribe request you confirm, which goes to that sender. We run no server, we collect no data, and nothing you read or write is ever sent to us.
What the app stores on your device
Your messages, your drafts, the files you open, and your settings are kept on your device in the app's own protected storage so they are there when you are offline. Your app-specific password is kept in the keychain, and, if you use iCloud Keychain, Apple syncs it to your other devices the way it syncs your other passwords.
What the app stores in your iCloud
Labels you create and which conversations they are on are kept in your own private iCloud database so they appear on your other devices. A label is its name and colour; a conversation is identified by a code derived from the message, not by the message itself. These fields are encrypted before they leave your device. No message, subject, address or attachment is ever stored in iCloud by Mail~.
Unsubscribing
When a message offers a way to unsubscribe and you choose Unsubscribe, Mail~ first shows you where the request will go. Once you confirm, it contacts that sender's unsubscribe address, over the web or by email from your own address, and nothing else. When a sender offers only a web page, Mail~ opens it in your browser instead, and what happens on that page is between you and that site. We are not involved and receive nothing.
What we receive
Nothing. Mail~ has no analytics, no crash reporting of its own and no third-party components that talk to anyone. If you contact us for support, we receive what you send us and nothing more.
Notifications
New-mail alerts are made on your device from mail your device fetched. You choose whether an alert shows the sender and subject, only the sender, or only that mail arrived. No alert passes through our servers, because we have none.
Permissions
Mail~ asks only for notifications. It does not ask for your contacts, photos, location or microphone.
Your rights
Delete the app and everything it stored on the device is gone; sign out first and the app also removes what it kept. Labels in iCloud can be removed from Settings in the app, or by removing Mail~'s data in your iCloud settings. Questions: the address published with the app on the App Store.