As of 6/2018, the following are supported platforms:
iOS -- Objective-C, C/C++, Swift
Android -- Java, Android NDK(C/C++) and Kotlin
Unity（iOS/Android）
Cocos2d-x (iOS/Android)
Unreal Engine -- BluePrint, Unreal C++
Cordova
For detail, Please send an eMail to smartbeat@frosk.co.jp, or the "Send a support request" form to contact us.