AppAdvice has once again teamed up with Lucky Clan in order to offer you a chance to win one of seven promo codes for ArtStudio ($2.99) for iPhone 3GS, third generation iPod touch, and newer.

There are plenty of drawing, painting, and editing apps for iOS, but very few with the power of ArtStudio. In fact, ArtStudio is much more of what Adobe, the premiere imaging software maker, has delivered for mobile artists, Adobe Photoshop Touch.

Start off with a completely blank canvas of up to 2448×3264, and then start drawing or import an image for editing. All of the necessary tools are at your disposal: paintbrush, pencil, eraser, paint bucket as well as smudge, blur, gradient, heal, burn, text, and selection tools. Quickly switch instruments at the bottom of the screen with a single tap, and perform a double tap or tap and hold to change the numerous options.

When you want to make canvas size or image size adjustments, apply a filter, manage layers, take advantage of more advanced selection commands, import additional images, save your project, and more, dive into the cleanly designed menu system by tapping the button in the top-left corner. You’ll notice all kinds of options, including being able to export projects to the iOS camera roll, iTunes File Sharing, the clipboard, or send them via email as JPG, PNG, or PSD.

If you’d like to give this powerful image app a try, go ahead and download ArtStudio Lite. As a reminder, ArtStudio is also available for iPad.

To have a chance at winning one of two ArtStudio promo codes, just hit that tweet button near the bottom of this page or retweet this post from your favorite Twitter app before Nov. 20 at 11:59 p.m. PST. 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 five ArtStudio promo codes. Remember to also check your junk email box when the giveaway is over.

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.