Descriptions : A free open source Jabber / XMPP client for Android. Easy to use, reliable, battery friendly. With built-in support for pictures, group chat and e2e encryption.
Features :
+ End-to-end encryption with OMEMO or OpenPGP
+ Send and receive pictures
+ Intuitive interface that follows the guidelines for Android design
+ Pictures / avatars for your contacts
+ Synchronized with the desktop client
+ Conferences (with bookmark support)
+ Address book integration
+ Multiple accounts / unified inbox
+ Very little effect on battery life
Required Android Versions : Jelly Bean [4.1–4.3.1] - KitKat [4.4–4.4.4] - Lollipop [5.0–5.0.2] - Marshmallow [6.0 - 6.0.1] - Nougat [7.0 – 7.1.1] - Oreo [8.0-8.1]