Amazon Appstore has the tradition of offering one paid app for free to its customers every day, and they can use it and install it for free as long as they have the Appstore installed. Today, they’ve put 15 previous free apps of the day up for free again in a promotion, including some good fan favorites like TuneIn Pro. You also get a dollar in free Amazon MP3 credit with some of the apps. This offer is available through the 31st, so you should act fast. What do you guys think? Do you still use the Appstore? Is this deal attractive to you? Tell us in the comments!