I'm looking to create one-time-use promo codes for my next Android app, so we can give people the full version of the app for free, without having to install an apk separate from the Play Store. I understand this can be done with the Get Object, PHP, and MySQL, but I'm not really sure where to start to do this.
Does anyone have any experience with this kind of thing? I'm a fairly advanced MMF2 user, and I've used the Get object to interface with Google API's on PC, Android and iOS, but I've never dealt with making my own server functions to handle this sort of thing. Anyone have any suggestions or examples of similar implementations?