android - Will Google's In App Purchase still work if I distribute my app to other app stores -

Currently, I did publish my free app with Google in the app purchase on Google Play Store, it works great .

I was thinking that if I distribute the same APK, other app stores such as Amazon, Opera, Google In-app purchase flow will still be practical?

Thank you.

According to in-app billing

  In -app billing only Can be implemented in applications that you publish through Google Play.   
 So it does not seem that this will not work