Patel described three different ways developers can distribute apps for the Nokia X, which are also the same ways consumers can download them:
The Nokia store: This will feature Nokia's own selection array of apps. Nokia says developers can use their standard Android Application Package Files (APKs)—which are sort of zipped-up software "suitcases" for transporting app and related software—and basically drag and drop them into the Nokia Store. Nokia has a tool that will scan the app for compatibility, and says that most apps won't need to change a thing.
Third-party app stores: As noted above, these are already common app sources in many countries. For instance, Yandex in Russia is one of the biggest providers of Android apps for users there. Third-party app stores will be available as links through the Nokia store, allowing users to download just about any app from anywhere.
Sideloaded apps: Android allows the ability to directly download an APK from any source, which means that all users will have to do is find the file and install it. (Though it's worth noting that this can be a risky proposition, depending on where users are finding their apps.)