Hello, here is our portfolio http://meliorgames.com. Feel free to ask promo code or download lite versions of any our games on the AppStore and soon on the Android market too. Our company is providing highly professional business app and game development services for iOS/Android. In our portfolio there are only our own games presented however the major part of our work is outsourced projects (business apps and other games) that are closed for review due to signed NDA, though we can provide you with the common idea of technologies used. We have rich experience in developing applications of different complexity for more than 5 years already and we can surely develop an app with push system, authentication with database and make the library. We will be glad to discuss the details of your project and possibly cooperate. The bid is a place-holder so far as we need to learn the details for bidding accurately. If you are interested in cooperation, please contact us we will discuss the details. We will be waiting for your reply. Thanks. Best regards