Communication · Open source
Ltt.rs
Daniel Gultsch
Simple and maintainable Android e-mail client
Opens the official F-Droid page
About Ltt.rs
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.
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 a 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. There is one specific work flow. K-9 Mail or FairEmail is more suitable for others.
* Minimal dependencies. Only widely known, highly tested libraries from reputable vendors. Third-party libraries are often of poor quality, and end up unmaintained.
* First class Autocrypt. Ltt.rs fits right into its strict UX guidelines.
* 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.
What's new in 0.4.4
* Bundle Letsencrypt for older Android versions
How to install Ltt.rs
- Tap Download — the app's official page on F-Droid opens.
- Install it with the F-Droid app (recommended, for automatic updates), or use the download button on that page.
- If Android asks, allow the F-Droid app or your browser to install apps, then tap Install.
- Open Ltt.rs from your app drawer.





