Hi, with AppGameKit V2 it has become much easier to export your apps for publishing on Google Play, Amazon and iOS.
To publish on Google Play you will have to register and pay a one-time $25 fee. You do not need to register as a company and many people sell as individuals. Follow this
simple guide to get started. Then on the Google Play Dashboard you can define new apps and fill in the meta-data. Through AppGameKit IDE when you are ready to publish, you can just select File > Export Project > As Android APK. There you fill in the needed information, icon etc. You will also need a Key File for publishing, which can be generated via Android Studio > Tools.
For iOS, you have to pay an annual fee of $100 plus tax. You also have to have a machine with OS X and have the mac version of AppGameKit installed. You can enroll in the Apple developer program at
this link. Once enrolled, you have to go to the member center to define application identifiers and generate provisioning profiles etc. Then you create an entry for the app via iTunes Connect similar to the Google Play app creation process. Then in AppGameKit on Mac you select File > Export Project > As iOS IPA and fill in the needed details. iOS is definitely more complicated when you are just getting started than Google, and it will take a week or more for Apple to approve your submission whereas Android and Amazon are always within 1 day.