Felix, the highly recommended App.net client developed by tigerbears, has just been updated to be the first app of its kind to support private messaging.

Private messaging is actually a relatively new feature of App.net. It was added to the premium Twitter-like social network just last month. And now, it’s already available in the new version of Felix.

With Felix’s private messaging support, you can easily send private messages (duh) to your friends on App.net.

What’s more, unlike in Twitter’s direct messaging setup, you can attach images and include custom links in your App.net private messages. It’s as though you’re simply composing a regular App.net post.

Also in the new version of Felix is support for full screen mode. What’s great about this new mode is that it’s chock-full of navigation gestures. To enable full screen mode, simply pinch out on the screen. Naturally, you pinch in to disable it.

Felix for App.net

If enabled, full screen mode lets you switch between tabs using two-finger swipes. It also lets you compose a post by two-finger swiping upward and scroll to top by two-finger swiping downward.

Notice that the back button is nowhere to be found in full screen mode. Don’t worry, there’s a corresponding gesture for that too. Just two-finger rotate counterclockwise to go back to the previous view.

Also, don’t worry if you find yourself having a hard time remembering all of the gestures supported in Felix’s full screen mode. Just give your iDevice a shake when in full screen mode to review the navigation gestures.

Optimized for iPhone and iPod touch running iOS 6.0 or later, the newly updated Felix for App.net is available in the App Store for $4.99.

Oh, and one more thing … According to tiger bears, the post button has been “moved to the top right of most screens. For now … ”