Windows Phone developers who want to add in-app purchases to their products can do so, but only on Windows Phone 8.
Guidelines recently posted by Microsoft confirmed that developers "can only add in-app products to Windows Phone 8 apps." This means that users and developers alike using will probably be out of luck.
App makers who want to take advantage of the new feature are advised to explain the "fundamentals" of the in-app product, such as alias, price, type, and languages. They also need to provide Microsoft with a name and image … Read more