Any success stories? Is integrating their SDK worth the effort?
Btw, on their website I see the following:
Playphone utilizes Cocos SDKBox capability to make it easy for developers familiar with Cocos-2dx and Cocos-3dx (wtf?) to integrate Playphone into their application. The following
features are available through this integration: In-App Billing, Leaderboard, Achievements
We see couple of users availing the benifit of Playphone plugin.
I see there’s description of Achievements, Leaderboard in our documentation.
Let me guide you here.
http://docs.sdkbox.com/en/plugins/playphone/v3-cpp/
As the Prerequisites section NOTE says -
You must install IAP plugin at first to make playphone work, then please import the playphone plugin, it will also download other plugins with it.
You could also check this thread here, that worked for another user -