Facebook Messenger is a faster way to send mobile messages to friends from your iPhone, iPod touch, and iPad. With Messenger, you can send and receive messages with any of your friends around the world or anyone in your mobile contacts list. Messenger is available on iPhone, Android, and BlackBerry.
This is a very small sized app so can run in any iOS device. Currently i am using this app in my iPhone 3GS and it runs great. Very useful app, so simple to play, nice graphics interface. Facebook Messenger app also allows users to share their location and attach photos within conversations, as well as engage in group chats which the app also supports. As Facebook Messenger is integrated with Facebook’s chat and messaging services, all conversations are archived as such through Facebook.
Requirements: Compatible with iPhone 3GS, iPhone 4, iPhone 4S, iPod touch (3rd generation), iPod touch (4th generation) and iPad. Requires iOS 4.0 or later. This app is totally free to download from iTunes.
Size: 6.5 MB