The Amazon Appstore is celebrating its first anniversary, and the company has revealed that the store has over 31,000 apps. The Kindle Fire was pointed out as being a major contributor to the success of the Android store.

“It’s been an exciting first year in the Amazon Appstore and we look forward to many more,” said Andrew Stein, director of Global Mobile Business and Products at PopCap Games. “All of our games, including the mega hit Plants vs. Zombies, have done extremely well in the Amazon Appstore, for both Kindle Fire and other Android devices; it’s a testament to the great Amazon Appstore shopping experience resulting from its user-friendly design and comprehensive catalog.”

“We expected that the Amazon Appstore would be a success and it’s been evidenced in the growth of the revenues since the launch,” said Adam Flanders, senior vice president of Sales & Marketing at Glu Mobile. “We have seen revenues from Amazon grow by over 1,000 percent in the four months since the Kindle Fire launched alone, and Blood and Glory recently reached the #2 spot in Top Selling Games. Glu is thrilled with the momentum behind Kindle Fire and the Amazon Appstore’s strong platform, global customer base, and exceptional merchandising capabilities.”

The top ten paid apps on the Amazon Appstore were all games, led by Cut the Rope and followed by numerous versions of Angry Birds, Plants vs. Zombies, Fruit Ninja and classic games Scrabble, Uno and Tetris. The top free apps were a little more diverse, but still led by the free version Angry Birds with Fruit Ninja Free also appearing.