In-App Billing: Putting a Store in Your Application

In-app billing allows a developer to charge users for app features after their app has already been

downloaded. Imagine charging users for more levels of your game or charging them for virtual goods

(such as a magic sword in a game). For non-gaming apps, you could charge for special features or

even per use if the use case is strong enough.

Comics is an application that is designed to give Android smartphone and tablet users access to digital versions of their favorite comic books. Downloading the application is free, but most of the comics cost the user. We’re sure that Comixology had to make some sort of deal with the comic book companies in order to offer this service, but after those companies receive their share of the profits, we’re also sure that Comixology makes a healthy profit from comic book readers paying for digital comic book content. All that is required of the user is to create an account online, and it syncs up very well.

Tap Tap Revenge is a music game in which players tap the screen to the rhythm of their favorite tunes.The game offers a few songs for free, but if you want more, you have to pay. We’re sure that the music industry gets its percentage along with the developers.

Also SnakePike  is a simple snake game in which players tap the screen to move the snake in different direction, but if you want more, you have to download free from googleplay