Open source Jabber (XMPP) client with multi-account support, clean interface. Free (as in freedom!) and ad-free, Xabber is the best and most popular Jabber client for Android. It is built to provide users with a simple, fast and secure messaging based on interoperable open standards. Xabber is also available for a browser, with an iOS version coming soon. <b>Features</b> * Modern material interface and great user experience * Device synchronization * Dynamic history loading * Multiple account support * Compatible with all standard XMPP servers * Sending Images and Files * End-to-end encryption to protect your privacy * Rich notification settings, including key phrases (with regular expressions, no less!) * Efficient power management With Xabber, you are free to customize the interface to a great extent, search and organize your contacts and even export your chats. <b>XMPP Features</b> Xabber supports many extensions to XMPP protocol, called XEPs (XMPP Extension Protocols): * RFC-3920: Core * RFC-3921: Instant Messaging and Presence * XEP-0012: Last Activity * XEP-0030: Service Discovery * XEP-0045: Multi-User Chat (partial) * XEP-0048: Bookmarks * XEP-0054: vcard-temp * XEP-0059: Result Set Management * XEP-0078: Non-SASL Authentication * XEP-0085: Chat State Notifications * XEP-0091: Legacy Delayed Delivery * XEP-0115: Entity Capabilities * XEP-0128: Service Discovery Extensions * XEP-0138: Stream Compression * XEP-0147: XMPP URI Scheme Query Components * XEP-0153: vCard-Based Avatars * XEP-0155: Stanza Session Negotiation * XEP-0184: Message Delivery Receipts * XEP-0191: Blocking Command * XEP-0198: Stream Management * XEP-0199: XMPP Ping * XEP-0203: Delayed Delivery * XEP-0221: Data Forms Media Element * XEP-0224: Attention * XEP-0237: Roster Versioning * XEP-0280: Message Carbons * XEP-0297: Stanza Forwarding * XEP-0313: Message Archive Management * XEP-0333: Chat Markers * XEP-0359: Unique and Stable Stanza IDs * XEP-0363: HTTP Upload Xabber is under activ