Right now, Apple is offering TETRIS® app for free if you have the Apple Store app. All you need to do is open the Apple Store app, click on the “Featured” tab, and scroll down until you see the TETRIS® app logo. You can click this and then it will give you a promo code for the app and prompt you for your iTunes password. At this point, you enter your password, and it will begin downloading! Check it out.