Awesome. Cross-platform. Now with group chat.

Download

WhatsApp for iPhone

WhatsApp for Android

WhatsApp for BlackBerry

WhatsApp for Nokia

Multiplatform
iPhone, Android, BlackBerry, Nokia
Group Chat
Because one-on-one chat is so last year :)
Push Notifications
Never miss a beat if the app is not running!
Free Text & MMS
Send text, video, images, audio for free
Instant Contacts
Chat with friends in your address book right away
Offline messages
Guaranteed delivery when you come online
Chat Backgrounds
Choose from our set or even your photo gallery
Custom Status
Tell everyone what's on your mind!

How it works

WhatsApp Messenger is a cross-platform mobile messaging app which allows you to exchange messages without having to pay for SMS. WhatsApp Messenger is available for iPhone, BlackBerry, Android and Nokia and yes, those phones can all message each other! Because WhatsApp Messenger uses the same internet data plan that you use for email and web browsing, there is no cost to message and stay in touch with your friends.
In addition to basic messaging iPhone, Android, Nokia and BlackBerry WhatsApp Messenger users can send each other unlimited images, video and audio media messages.

Download

Group chat

2 months ago — It took us slightly longer, but group chat is finally here. If you have an iPhone, BlackBerry or Android phone, simply upgrade to version 2.6 of our software to enjoy group chat. If you have a Nokia Symbian S60 phone, we are working on adding group chat to our Symbian client and hope to release
Read more in our blog

WhatsApp for your phone

Reviews

WhatsApp Messenger lets you keep the text messages flowing to your friends for free

— PCWorld
If you do a lot of texting, this app is a must-have, giving you unlimited texts with other users without having to worry about extra charges

— cnet
See when your friends are typing as well as the last time they checked their messages

— TUAW