Isaac Maw
Technical Content Creator
Published June 17, 2026
Updated June 19, 2026
4 min
Choosing the Right PDF Viewer for Your Mobile App: Native PDF Frameworks vs. Apryse
Isaac Maw
Technical Content Creator
Summary: When building mobile apps with PDF viewing, native tools like iOS PDFKit and Android PDFRenderer offer free, basic rendering, navigation, and annotation capabilities. However, advanced features, cross-platform consistency, and enterprise-scale performance often require significant custom development. Apryse SDK provides a unified, cross-platform solution with advanced PDF functionality, customizable UI, better performance, and faster development through a single codebase.
When you’re building a mobile app that needs PDF viewing, the decision between native PDF support or a commercial SDK requires careful consideration. Most commonly, developers stand up projects using the built-in tools PDFKit and PDFRenderer for iOS and Android respectively, as product requirements grow from simple viewing to annotations, form filling, signatures, search and large document support, built-in capabilities no longer fit the bill, and require significantly more engineering effort to get PDFs on screen.
In this article, let’s look at iOS PDFKit, Android PDFRenderer, and Apryse SDK, to help you determine if it’s time to make the switch.
Building a web app? Check out a similar topic, Native Browser PDF Rendering vs Dedicated PDF SDKs.
Why Mobile Apps Need PDF Viewing
If you’re reading this, you probably know whether or not your app needs PDF support. However, the specific use case has implications for future feature requirements. For example, common use cases include:
- Field applications for document reference: accessing policies, CAD drawings, and work instructions on-the-go
- Document review: viewing contracts, agreements, and financial or insurance statements on the mobile device
- Medical Records: for providers and patients, viewing secure, sensitive documents in an accessible experience
Even before document capabilities are expanded to include features like form filling, signatures or comments, the viewing requirements of these different use cases vary widely.
What is iOS PDFKit?
PDFKit is the system library for PDF support in iOS. It’s designed to give developers access to rendering, basic text extraction, and annotations, as well as a few other functions such as search and thumbnail generation.
As a system library, it’s easy to integrate and doesn’t require additional licensing.
What PDFKit Does Well
- Fast implementation
- Native iOS integration
- Basic zooming and navigation
- Text selection
- Simple annotations
Challenges Developers Encounter
As an iOS-only solution, developers using PDFKit are forced to start over on PDF support when developing for Android. In addition, PDFKit offers limited UI customization, and advanced requirements fall to custom development, adding significant engineering effort to projects.
For proof of concept and lightweight and simple document viewing, PDFKit is valuable for iOS developers. For more complex PDF workflows, it may not measure up.
What is Android PdfRenderer?
The PDFRenderer class is part of the Android.graphics.PDF framework package. PDFRenderer allows apps to decode and read existing DPF documents to display on screen, zoom, and scroll. Android also includes other components for form filling, annotations and other PDF features.
What Android's PDF Package Does Well
In addition to being free, Android supports:
- Basic PDF page rendering
- Simple implementation for viewing
- Additional functionality for form filling, annotations and print-to-pdf
Challenges Developers Encounter
Developers are working with a low-level API, leaving much of the viewer experience to internal development. Performance tuning, additional functionality and cross-platform development quickly expand the engineering to-do-list, as well as ongoing maintenance, for PDF support in your Android app.
Cross-Platform Challenges
This is the key challenge of building with iOS and Android system libraries. For most mobile developers, cross-platform development is the reality. With system libraries for PDF capabilities, developers are signing up for:
Two Codebases
- Separate implementations
- Different capabilities
- Different UI behavior
- Different bug fixes
Two User Experiences
- inconsistent tools
- inconsistent navigation
- Inconsistent behavior in other experiences such as annotations or forms
Why Developers Choose Apryse
The Apryse SDK is a comprehensive cross-platform PDF and Office SDK that allows you to write stand-alone, cross-platform and reliable commercial applications. Using Apryse's Mobile SDK, you can build powerful iOS apps that can view, edit, and annotate PDF, Microsoft Office, and other file formats, with support for Xamarin, Flutter, and React Native so you can maintain a single codebase.
Build Document-Centric Applications
The Mobile SDK supports a wide range of capabilities, and it’s licensed with modular add-ons, allowing you to scale as you grow, adding functionality such as digital signatures, redaction or template generation only when it’s needed.
- Build a Consistent Experience | Apryse SDK includes UI customization and advanced PDF features out of the box, maintaining a consistent experience across platforms.
- Enterprise-grade Performance | Apryse SDK includes optimization for large PDFs, and support for technical drawings, CAD files, Office documents, and enterprise security requirements.
- Faster Time to Market | With Apryse, developers eliminate costly custom development and implement a polished, high-performance PDF experience faster. A dedicated SDK allows teams to ship features rather than build infrastructure.
What’s Next?
The iOS and Android native PDF libraries are capable and valuable for basic PDF capabilities, especially since they don’t require additional licensing.
Choose PDFKit and PdfRenderer when:
- Viewing is the only requirement
- Documents are relatively simple
- Internal users are the audience
- Engineering resources are available
- Feature roadmap is unlikely to grow
However, we’ve heard from developers that when documents are core to the application, advanced workflows are required, and time-to-market matters, Apryse SDK quickly becomes the preferred solution.
The right choice depends on whether PDFs are simply files your app displays, or a core part of the product experience your users depend on every day.
To learn more about the Mobile SDK, visit our documentation. To get building, start your trial. And don’t hesitate to contact us with any questions.
