If you purchased an app or an app upgrade
on Apple's App Store, Google Play, or Amazon's Appstore store, it's not
possible to transfer your purchase to a different platform. Apple, Google, and
Amazon handle all transaction management, and none of them offers a way to make
purchases transferable. According to each app store's terms of service, when
you purchase an app or an app upgrade on one platform, you are paying for a
license to use that app only on that platform, not on multiple platforms. Surf
City Apps as an app publisher plays no role in that process.