You can have following Ads or App analytics integrated in your app in iOS / Android both.
– Admob
– Facebook (Audience Network)
– Chartboost
– Unity Ads
– etc.
Moreover any kind of bugs resolution related to libraries as well as upgradation of Cocos2dx project. From porting the project to final apk.
• Reskin your 2D / 3D games developed in Cocos2dx / Unity. (WITH YOUR PROVIDED GRAPHICS ONLY)