The official Twitter app has just received an update on iOS and Android, bringing new features to both platforms, plus an “optimized” Ice Cream Sandwich experience as seen above. The app is also currently available on Amazon’s Appstore for the Kindle Fire now, and the company says it will pop up in the Barnes & Noble Nook Store February 23rd. For both Android and IOS the app has brought back / added a swipe gesture to reply to, reweet or favorite something without leaving your timeline, plus a notification on the Find Friends feature that it will be uploading their address book to Twitter’s server — a welcome change after the Path fiasco. The iOS-specific changes are the return of copy and paste, more options to share or save links in tweets, a mark all read for DMs and configurable font sizes. While it is optimized for ICS, on our CyanogenMod 9 tablet, the layout still looked reminiscent of the Gingerbread version instead of the iPad’s richer layout. Hit the source links below to give it a look yourself and let us know if it’s beating out your favorite mobile app yet.