To purchase Android games or apps you need to create a Google Checkout account by signing up on checkout.Google.com. Get into the Android Market through the home button, then "Market" on your Android device. Press the "Buy" or "Install" button to verify the information and download the app. View your email for receipts after the Android Market purchases. Check out http://www.ehow.com/how_5628531_buy-android-apps.html to learn more.