Kdan PDF SDK is a universal mobile library for developers who want to render, manipulate and annotate PDF files in their iOS, Android, and Windows applications. Kdan PDF SDK extends your app's features with a set of professional PDF capabilities on smartphones and tablets. -Complete PDF API We offer a variety of flexible kit plans. Developers can start with our demo version and select the plan that meets their needs. -Stable Viewer Engine Kdan's PDF viewer engine has been perfected by 10 years of innovation and experience. We introduce regular updates to ensure the stablity of your apps. -Easy to Integrate The PDF SDK easily integrates within your app using our SDK documentation and gives you more time to focus on designing your app. -Cross-Platform SDK No matter what platform you integrate with, our PDF SDK helps developers build powerful apps that can view, edit, and annotate PDFs. -Unparalled Developer Experience Create great apps regardless of your team's preferred language. Kdan PDF SDK works with mainstream programming languages, including Objective-C, Java, and C#. -Fully Customizable Developers can design unique user experiences with fully customizable UI source code or use the default built-in Ul elements directly for your apps.