I found a useful application. FreeAppParty offers you hand-picked great quality apps every day for FREE! https://itunes.apple.com/us/app/freeappparty/id487563905?mt=8 1. Finds a free apps. 2. Everyday reward. 3. Get Apple gift card(15$) or Amazon gift card(15$). Step 1. Install & sign up (** You can get some points if you enter the referred ID. For example, 74t) Step 2. Get free apps and 'Party Treats' points. Step 3. Redeem