SDK

JavaScript SDK
JavaScript SDK is SDK for built-in applications that are iframes, the content of which is located on the developer’s server.

External JavaScript SDK
External JavaScript SDK is SDK for MOBILE_HTML applications and external browser-based apps. It can be used for client OAuth authorization for external applications, to invoke UI payment methods (just as JS SDK) for MOBILE_HTML applications, publish topics via publishing widget, send notifications or invite users to a game, and to invoke REST API methods.

Android SDK
Android SDK is used for native Android applications. It allows to authorize users via client authorization, publish new posts, invite friends to a game, send notifications and invoke REST methods.

iOS SDK
iOS SDK is used for native iOS applications. It allows to authorize users via client authorization, publish new posts, invite friends to a game, send notifications and invoke REST methods.

Unity SDK
Unity SDK allows to deeply integrate you Android/iOS app that uses Unity with OK