WP7 - selling extensions

Question

I'm trying to create some application for Windows Phone >= 7.1 During plannin my work and specyfiong technical requirements I've come across one problem. I wan't to have free application with basic functionality. And then it should be extendable with some non-free extensions (dlls?, databases?, SaaS?) Is it possible at the moment to use some MS api/app/etc. to be able to publish such extensions and sell them? What is the best way to do this if there is more than one solution?

Thank you for any help.

Answer 1

The only way you can do this at present is to handle the additional purchases yourself.

You'd have to set up a website which customers could create an account on and purchase extensions through, then have them also log into your app with those account details to determine what additional data to download or functions to enable.

You could be smart and include the website functionality into your app with a browser control. Take a look at the Amazon Kindle app for an example of how they accomplish it.

Answer 2

As of right now (June 2012), in-app purchases are not supported. Your only choices, then are being a paid app and supporting trial mode.