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Android Apps > Communication > Ltt.rs - JMAP Email client
Ltt.rs - JMAP Email client icon

Ltt.rs - JMAP Email client

by Daniel Gultsch · Communication · Free
On Google Play since March 2020 · Data updated 2026-10-16
Google Play

Ltt.rs - JMAP Email client is made and published by Daniel Gultsch. AppBrain is an independent app data site and isn't affiliated with Daniel Gultsch. The app name, icon, screenshots and description belong to Daniel Gultsch and are shown as published on Google Play.

AppBrain's verdict

EstablishedNiche
Total installs
5.2 thousand
Rating on Google Play
3.18
62 ratings
Last updated
January 7, 2024

Ltt.rs - JMAP Email client is a niche app, with 5.2 thousand installs. It doesn't have enough ratings yet to judge what users think.

Installs

Tracked by AppBrain
Last 30 days
19
Play install range
5+ thousand
Launched
March 2020

Installs over time

Ltt.rs - JMAP Email client has been installed 5.2 thousand times. Over the past 30 days, it has been installed 19 times.

Rankings

Google Play top charts

Google Play Rankings for Ltt.rs - JMAP Email client

This app is not ranked

Competitors

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Releases

Updates seen on Google Play
Version
0.4.3
Launched
March 2020
  • Apr 15, 2026Installs5,000+ installs
  • Feb 4, 2026Price DropNew price: Free ($0.22)
  • Nov 26, 2025Price IncreaseNew price: $0.22 (Free)
  • Oct 8, 2025Price DropNew price: Free ($0.49)
  • Feb 23, 2024Price IncreaseNew price: $0.49 (Free)
Show all changes Show fewer

User feedback

Ratings and reviews on Google Play

Google Play Rating history and histogram

28
0
5
11
16

Comments on Ltt.rs - JMAP Email client for Android

★★★★☆ Matiur Rahman · Dec 29, 2023
Please tell me in detail how to configure this email app.
★★★★★ Benedikt Kaussen · Mar 4, 2020
Pretty good tech demo. It's not yet usable on a daily basis, but it provides an outlook on what is to come.
★★★★★ Indelible Inkstain · Jun 26, 2020
Nice app in need of additional features (which I have no doubt are planned) but definitely usable for now. Would like to be able to see headers and/or source before opening a message; slide to delete option and, of course, dark theme :)
★★★★☆ Michael Wang · May 4, 2021
Regular IMAP plugin is needed for the app.
★☆☆☆☆ T P · Mar 4, 2020
Couldn't add my account. Wouldn't understand my email address - a gmail account. This asked for a connection url to set it up, but no documentation anywhere on what the connection url is supposed to be. Deleted.
★☆☆☆☆ Timmy Douglas · Apr 4, 2026
Can't get it working, it seems to force trying to log in with the email address rather than allowing a separate login name which is how I have it set up in stalwart. Would like to see more debugging info
★★☆☆☆ bonsairobo · Apr 27, 2026
It seemed to work at first but then failed to render HTML in an email body. Instead, it just said (nobody) which was not true.

Technology

Found in the app by AppBrain
Ads
No ads
Price
Free
Libraries
33
App size
7.25 MB
Needs Android
6.0+
Content rating
Everyone

Technologies used by Ltt.rs - JMAP Email client

7 permissions · 33 libraries
Subscribe to see full permission and library details

About the app and developer

About Ltt.rs - JMAP Email client

Ltt.rs - JMAP Email client is a communication app developed by Daniel Gultsch.

Install Statistics

Ltt.rs - JMAP Email client has been installed 5.2 thousand times. In the last 30 days, the app was installed 19 times.

User Ratings

Ltt.rs - JMAP Email client is rated 3.18 out of 5 stars. The rating is based on 62 ratings.

App Information

Ltt.rs - JMAP Email client is freely available from Google Play. The app size is 7.26 MB. The latest version available is 0.4.3. The last update was on January 7, 2024.

Technical Requirements

Ltt.rs - JMAP Email client requires Android 6.0+ or higher. The app has a content rating of Everyone. The app has been available on Google Play since March 2020.

App Performance Report

Get a detailed PDF report for Ltt.rs - JMAP Email client with download trends, rating history, and key performance statistics — useful for competitive research or tracking your own app. Learn more

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Developer information for Daniel Gultsch

Daniel Gultsch

inputmice@siacs.eu

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Frequently asked questions about Ltt.rs - JMAP Email client

Is Ltt.rs - JMAP Email client free?

Yes. Ltt.rs - JMAP Email client is free on Google Play.

Is Ltt.rs - JMAP Email client still available?

Yes. Ltt.rs - JMAP Email client is on Google Play, and the last update we saw was on January 7, 2024.

Does Ltt.rs - JMAP Email client contain ads?

No. Google Play does not list Ltt.rs - JMAP Email client as containing ads.

What Android version does Ltt.rs - JMAP Email client require?

Ltt.rs - JMAP Email client runs on Android 6.0 and higher.

How large is Ltt.rs - JMAP Email client?

Ltt.rs - JMAP Email client is 7.26 MB.

Is Ltt.rs - JMAP Email client suitable for children?

Google Play rates the content of Ltt.rs - JMAP Email client as suitable for everyone.

How many times has Ltt.rs - JMAP Email client been installed?

Google Play lists 5,000+ installs for Ltt.rs - JMAP Email client.

How do people rate Ltt.rs - JMAP Email client?

Ltt.rs - JMAP Email client scores 3.18 out of 5 stars, from 62 ratings on Google Play.

Who made Ltt.rs - JMAP Email client?

Ltt.rs - JMAP Email client was developed by Daniel Gultsch. It is listed in the communication category on Google Play.

What are the best alternatives to Ltt.rs - JMAP Email client?

People looking at Ltt.rs - JMAP Email client also look at these communication apps: Go Email: All Email App, Email: All Mail Access, Email App for Hotmail, Outlook, Email box for Hotmail, Outlook, R2Mail2.

Share Ltt.rs - JMAP Email client

Store listing

By Daniel Gultsch, from Google Play

“No-frills, easy to use, Email client using the JSON Meta Application Protocol”

Ltt.rs - JMAP Email client Screenshot 1 of 7
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Ltt.rs - JMAP Email client Screenshot 7 of 7
Screenshots by Daniel Gultsch, from the Google Play listing
Description by Daniel Gultsch Written by the developer, not by AppBrain. Click to read.
Ltt.rs (pronounced Letters) is a proof of concept email (JMAP) client currently in development. It makes heavy use of Android Jetpack for a more maintainable code base than some of the preexisting Android email clients.

To use Lttrs you need a JMAP (JSON Meta Application Protocol) capable mail server!

Features & Design considerations:

· Heavily cached but not fully offline capable. Ltt.rs makes use of JMAP’s great caching capabilities. However actions, such as marking a thread as read, need a round-trip to the server until their consequences like unread count are updated. Ltt.rs will ensure that the action itself won’t get lost even if performed while momentarily offline.
· No settings aside from account setup. Settings invite feature creep and make the app hard to maintain. Ltt.rs aims to support one specific work flow. Users who desire a different work flow may find K-9 Mail or FairEmail more suitable.
· Minimal external dependencies. Third party libraries are often of poor quality and end up being unmaintained. Therfore we will only rely on well known, well tested libraries from reputable vendors.
· Autocrypt as a first class feature¹. With its strict UX guidelines autocrypt fits right into Ltt.rs.
· Ltt.rs is based on jmap-mua, a headless email client, or a library that handles everything an email client would aside from data storage and UI. There is also lttrs-cli which uses the same library.
· When in doubt: Look at Gmail for inspiration.

¹: Planned feature

Ltt.rs is licensed under the Apache License 2.0. The source code is available on Codeberg: https://codeberg.org/iNPUTmice/lttrs-android

Recent changes:
· Enable predictive back gestures
Official page on Google Play
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