The absolute must-have app for panorama photographers, Autostitch Panorama, just got a major update. Now it is fully optimized for fourth generation iDevices!

Autostitch Panorama is the ultimate panorama app. No need to take pictures in a certain way or use a template — just take some overlapping pictures in any app, then open up Autostitch Panorama, pick the pictures, and the app does the rest. Read our full review here.

This update takes advantage of the iPhone 4 features. Now it will properly use the full resolution of the retina display and allow stitching to take place in the background while running other apps. In addition, they’ve added the ability to include a caption with images uploaded to Facebook, improved the zooming behavior and other bug fixes. The app is also now optimized for use with the new iPod Touch.

If you’d like to win that promo code, simply comment below. You must have a U.S. iTunes account to redeem. Contest ends November 11 at 2:00 p.m. EST. Good luck!