Courier on your phone and desktop, in development.
Two native apps and a shared Swift library read mail from the same API as the web client. They read and triage mail. This page describes them from their own repositories.
Courier for iPhone and iPad
Needs iOS 18 or later. It signs in through the system browser, shows a compact mail list on iPhone and a three-column workspace on iPad, opens a message, lets you star, mark read, archive, or trash it, and shows a conversation in order with the option to mute it.
Courier for Mac
Needs macOS 26 or later. It has the same scope as the iPhone and iPad app: sign-in, a mail list, message detail, triage, and conversations.
CourierKit
A Swift package under both apps. It holds the API client, typed account and message models, sign-in with PKCE and the Keychain, and thread loading and muting.
Questions about this tool?
Write to Renkara Media Group and a person will answer.