AppAdvice has teamed up with Hesham Wahba in order to offer you a chance to win one of 15 promo codes for Tracing Paper ($.99).

Tracing Paper is a universal app, which means it can be used effectively on both the iPhone and iPad.  The app allows you to import your own images and trace them by using the tip of your finger.  The imported image is partially translucent allowing you to easily see the lines you have drawn.  There is also a basic grid overlay in order to help you align the lines within your drawing.  Imported images can be resized by pinching and pulling so you can focus on only certain areas.

Tracing Paper features three tools: pencil, brush, and eraser.  The pencil will give you fine lines, while the brush will give you much thicker lines so you can fill in large areas.  Shading can be done by going over the same area multiple times just as you would with a real pencil.

Images can be saved to your camera roll or sent via email so you can share your unique creation with friends.

Tracing Paper is still in its early stages, but the developer has promised to bring even more features to the app via updates and is also working on adding some of the features that are available in the iPad version to the iPhone.

To have a chance at winning one of seven Tracing Paper promo codes, simply hit that green retweet bottom near the bottom of this page or retweet this post from your favorite Twitter app before 11:59 PM PDT tonight (May 21st). We will then search the Twitterverse for all of the retweets and randomly choose our lucky winners. The winners will be notified via Twitter, so please be sure to follow us so we can send you your promo code via a direct message.

Non-Twitter users and those of you who want to increase your odds of winning can leave a relevant comment below before 11:59 PM PDT tonight for a chance to win one of the other eight Tracing Paper promo codes.

Feel free to participate in the giveaway via either or both methods. This giveaway is only open to U.S. iTunes account users.