An SDK, or Software Development Kit, is a collection of tools, libraries and frameworks which are designed to make application development easier. SDKs enable software developers to build software applications faster and in a more standardized way. SDKs can function as "wrappers" for functionality such as API endpoints (more on this later.)
If you're a developer reading this, the chances are that you've probably already used an SDK, even if you didn't realise it. For example, .Net developers use the .Net SDK to develop C# and .Net applications. Moreover, popular development platforms typically come with their own SDKs. Mobile developers use the iOS SDK to develop iOS applications and Android programmers use the Android SDK. For a programmer, an SDK is as vital as a box of tools is to a mechanic.
SDKs make APIs easy
Learn more about Sinch SDKs.