aTalk (Jabber / XMPP)

cmeng

About this app

aTalk - xmpp client for android rich in features:
* Instant messaging in plain text and E2E encryption with OMEMO or OTR
* SSL Certificate, DNSSEC and DANE for secure Connection Establishment
* OMEMO Media File Sharing for all files contents
* Fault-tolerance file transfer algorithm, ease with sharing reliability
* File sharing for all document types and images with thumbnail preview
* Support unread message badges in contact and chat room UI
* User defined option for quite hours
* Support Text to Speech and speech recognition for chat session
* XEP-0012: Last Activity time associated with contacts
* XEP-0048: Bookmarks for conference room and autoJoin on login
* XEP-0070: Verifying HTTP Requests via XMPP entity for user authentication
* XEP-0085: Chat State Notifications
* XEP-0124: BOSH with Proxy support
* XEP-0178: Use of SASL EXTERNAL with TLS Certificates authentication
* XEP-0184: Message Delivery Receipts with user enable/disable option
* XEP-0251: Support Unattended and Attended Jingle call session transfer
* XEP-0313: Message Archive Management
* XEP-0391: JET for OMEMO encrypted media file sharing
* Call waiting, placing current call on hold; switching between calls
* Implement Jabber VoIP-PBX gateway Telephony support
* Integrated Captcha protected room user interface with retry on failure
* Support media call with ZRTP, SDES and DTLS SRTP encryption
* GPS-Location implementation standalone tool, send locations to your desired buddy for real-time tracking or playback animation
* A 360° street view of your current location use for self-guided tour
* Built-in demo for GPS-Location features
* Integrated photo editor with zooming and cropping for avatar
* Last message correction, message carbons and offline messages
* In-Band Registration with captcha option support
* Multiple accounts support
* Dark and light Themes support
* Multi-language support (Bahasa Indonesia, Chinese Simplify, English, German, Portuguese, Russian, Slovak and Spanish)
* Privacy Policy: https://cmeng-git.github.io/atalk/privacypolicy.html

Ratings and reviews

This is the only Android XMPP client I have evaluated that actually implements most of the things one would use XMPP for (secure text, reasonably secure file transfer, group chat, voice conference, video conference). All the others missed on one or more points (some don't provide for encrypted text; some actually place transferred files on servers with URLs; some require account on author's servers and some require being logged into those servers to function correctly.) Rough edges but given the above, well worth working with cmeng to smooth them out! I recommend this XMPP client, but none of the others due to their serious functional deficiencies!