PSPDFKit for iOS
PSPDFKit is a mobile PDF SDK for iOS, macOS, Android, Windows, and Web that deals with everything related to PDF. It’s a large framework, and we expose a lot of APIs, so many aspects can be customized. The APIs can be intimidating at first, but you really only need the basics to get started.
Annotating PDFs is where PSPDFKit excels. But how do you keep your users’ annotations in sync across all their devices? Let us do the heavy lifting for you: PSPDFKit Instant is our efficient, real-time-capable, offline-first solution for syncing documents and annotations across multiple devices and users.