诚意寻求经验丰富的iPhone app开发人员／公司／工作室。需要升级下面的app.

https://itunes.apple.com/us/app/pen-pals/id368168674?mt=8

我们想重写这个app. 新的设计已经完成，后端API也已经开发完。你只要完成iPhone app的开发。我们希望能在4周之内交付。主要的功能如下：

-Email login/signup
-Facebook connect / Google+ login
-iPhone 5 compatible (along with iPhone 4/4s) / iOS6 & iOS 7 Compatibility Required
-In-app purchases
-Badge reward system (similar to foursquare)
-Push notifications
-Some animations (similar to what's in the app now)
-Fast app switching
-Landscape mode for composing messages
-User Profiles
-User Interests
-Pen Pals (similar to "friends" on FB)
-Compatibility with existing userbase

详细的需求文档我们会发送给我们感兴趣的开发人员。