Your friend is using FeaturePoints. Visit this link on iPhone or Android for a bonus 50 points: http://featu.re/B1ATR6
Try free apps
Earn points by downloading free apps on your iPhone or Android device, and trying them for a minute.
Redeem your points for rewards, including paid apps, iTunes, Amazon, Starbucks, PayPal cash, and more.
...and paid apps for free
Use your points to get any paid app from the App Store for free.