WhatsApp Messenger is a cross-platform mobile messaging app which allows you to send and receive unlimited text, audio, video and voice messages without having to pay for SMS and MMS. It routes the messages through Internet via wireless (Wi-Fi) or mobile data (3G/4G/EDGE) network.

In essence it’s an instant messaging app with support of using real phone number as contact identity. WhatsApp Messenger is available for iPhone, BlackBerry, Android and Nokia and support messaging between all these devices with WhatsApp installed.

Also see: Send Unlimited Free Texting and Picture Messaging (SMS & MMS) using TextNow App

Key Features of WhatsApp Messenger:

1. No hidden cost.
2. Multimedia support – Send video, images, and voice notes to your friends and contacts.
3. Group chat and conversations with your contacts.
4. No international charges.
5. No user name, password or PIN to remember as WhatsApp works with real phone number, just like SMS would, and integrates flawlessly with your existing phone address book.
6. No login or logout as WhatsApp always on and always connected with push notifications.
7. The contacts are automatically retrieved from phone’s Address Book. Contacts who are already have WhatsApp Messenger will be automatically displayed under Favorites, similar to a buddy list.
8. Ability to send offline messages to contacts who switch off the phone.
9. User can set status message, just like any other instant messaging application.
10. Location sharing.
11. Exchange contacts.
12. Can set custom wallpaper.
13. Can set custom notification sounds.
14. Landscape mode.
15. Displaying precise message time stamps.
16. Ability to email chat history.
17. Broadcast messages (SMS text or MMS) to many contacts at once.

Download WhatsApp Messenger for free now from US iTunes Store.

Note: The free WhatsApp Messenger sale offer is only available in US iTunes Store.