Ltt.rs for Android

Proof of concept e-mail (JMAP) client (pronounced "Letters"). Makes heavy use of Android Jetpack to be more maintainable than some of the other Android e-mail clients.

If the above screenshots don’t do enough to convince you, you can watch this short video on YouTube.

Features, and design considerations:

• Heavily cached, but not fully offline capable. Ltt.rs makes use of JMAP’s great caching capabilities. However, marking a thread as read does round-trip to the server to update things such as read count. The action itself won’t get lost even if performed offline.
• Account setup and done. Settings invite feature creep and its friend unmaintainability.
• Minimal dependencies. Third party libraries are often of poor quality, and end up unmaintained. Only widely known, highly tested libraries from reputable vendors.
• Native Autocrypt support.
• Based on jmap-mua, a headless e-mail client, or a library that handles everything an e-mail client would, aside from data storage and UI. There is also lttrs-cli, which uses the same library.
• Looks to Gmail for inspiration in cases of uncertainty.

Try it

You can download Ltt.rs either from F-Droid, or for a small fee from Google Play.

If you want to use F-Droid you can also use our F-Droid repository instead of the official one:

https://ltt.rs/fdroid/repo?fingerprint=9C2E57C85C279E5E1A427F6E87927FC1E2278F62D61D7FCEFDE9346E568CCF86

All three versions are signed with the same key, so it is possible to switch between them.

Attention: You need a JMAP capable e-mail server to use Ltt.rs

As of October 2022, the main options are:

• Cyrus
• Apache James. Follow JAMES-2884 for more information.
• Stalwart JMAP

See also: jmap.io/software.html

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