AppAdvice has teamed up with Ayogo, our latest AppAdvice Daily podcast sponsor, in order to offer you a chance to win a copy of iTheme ($0.99) for iPhone, iPod touch, and iPad.

Are you tired of looking at that same old boring background on your iPhone or iPad? If so, we’ve got a wonderfully festive present for you. The team at Ayogo has packaged together an exclusive selection of 350 lock screen and background themes in their highly rated iTheme wallpapers app.

Each of the themes were specially crafted to perfectly fit your iPhone, iPod touch, or iPad’s different screen resolutions, therefore, things will look nice and tidy.. While scrolling through the many different themes, you can rate and even preview them with a set of icons laid over the top. That way, you’ll always know how they will look before wasting your time saving and applying them only to want get an unexpected result.

Themes are designed to work beautifully with any iDevice. You just have to decide which one.

In addition, themes can be modified in many ways, including color scheme and orientation, to help you stand out even more among your friends. If you feel proud or just generous, you can share themes via Facebook, Twitter, or email.

Even though there’s already a wide selection, Ayogo is always working to add themes with the new and popular ones being highlighted for the greatest convenience.

To have a chance at winning one of two Twitter designated iTheme promo codes, simply retweet this article before 11:59 p.m. PST tomorrow night (December 18). 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 p.m. PST tomorrow to have a chance at winning one of the other three promo codes.

Feel free to participate in the giveaway via either or both methods. Only one entry per person per method is allowed, totaling up to two entries per person if using both. Good luck!