Ltt.rs

Simple and maintainable Android e-mail client
AppID:rs.ltt.android
Author:Daniel Gultsch
License:Apache-2.0
Donation:Webpage
LiberaPay
InRepoSince:2020-03-23
LastRepoUpdate:2025-04-13
LastAppUpdate:Unknown
LastVersion:0.4.4
Categories:Email, Internet
APK source:
Google Play:Check if it's there
icon 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.

WhatsNew:

* Bundle Letsencrypt for older Android versions

Download Website Source Issues
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While you can download the APKs here directly, you should preferably use an F-Droid client so the app stays up-to-date on your device.

Packages

Version 0.4.4 (2025-04-13) no RB details available help icon

Android Versions:
  • Target: 15.0
  • MinVer: 6.0

Download (7.3 M)

Version 0.4.3 (2024-01-11) no RB details available help icon

Version 0.4.2 (2023-12-25) no RB details available help icon