Case Study

Case Study: Help Create a Powerful and Universal UWP PDF App

By ComPDFKit | 2023 Sep 01
IT Case Study Windows

This blog post is about a customer of ComPDFKit which provides convenient office software for various users. According to their product plan, they want to develope an app that runs on Windows 10 UWP platform, using C# programming language. 


This app aims to provide some of the most common and useful capabilities for handling PDF documents, such as viewing, annotating, filling forms, and signing, without maintaining multiple versions of the app.

How ComPDFKit Helped Them


To achieve these functionalities, they needed a high-performance, high-compatibility, and high-stability PDF SDK. They searched for many PDF SDK providers on Google, but they found that many of them did not support the UWP platform, had incomplete features, or had high prices. Finally, they compared and chose ComPDFKit, a new brand in SDK, but they found ComPDFKit focused on PDF technologies for more than ten years and were impressed by the features and advantages introduced on ComPDFKit's website.


They contacted ComPDFKit's sales team and got a demo version of the SDK. They tested the demo version and found that it could meet all their requirements. Their developers said, "I received and tested your SDK demo, it works fine, and the rendering looks perfect."


They decided to purchase ComPDFKit's UWP platform PDF API annual subscription service and started making API requests from their app. With the help of detailed documentation and sample code, as well as technical support and guidance, they were able to successfully integrate ComPDFKit's UWP library.


Upon the completion of the integration, the exceptional stability and compatibility attract a plethora of users to download and engage with their app. This particularity notably and advanced features set their app apart from competitors, resulting in an impressive number of conversions to paid users. Overall, this company expressed high satisfaction with the benefits garnered from the utilization of ComPDFKit.

About the Test: Compatibility


Compatibility of ComPDFKit


PDF is a widely used format for document exchange, but it also has some challenges when it comes to compatibility. Different PDF readers may render the same PDF file differently, causing some features or annotations to appear inconsistent or even missing. This can affect the user experience and the accuracy of the document.


When their developers tested our PDF SDK, their developers found that the annotations looked different when they opened the same PDF file with different viewers. He contacted us and asked for our help to solve this issue.


These compatibility issues are further exacerbated by a lack of assertions in Adobe's PDF specifications for certain implementations, leading to varying interpretations by different PDF technology firms. However, ComPDFKit, in its development of PDF technology, has made proactive strides to address as many compatibility issues as possible, aiming to ensure a seamless experience for its users despite the prevalent discrepancies in the industry.


There are reasons below why some PDF features may not be compatible with some viewers.


         - The PDF standard: The PDF standard defines the basic structure and features of a PDF file, but it also allows for extensions and variations. Some viewers may support only a subset of the standard, or implement it differently from others. This can cause some features to be unsupported or incompatible with some viewers.

         - The market situation: There are many PDF viewers available in the market, each with its own market positioning and focus. Some viewers may focus on speed and simplicity, while others may focus on functionality and compatibility. Some viewers may be updated more frequently than others, or have more user feedback and support. This can cause some features to be more reliable or popular with some viewers than others.

         - The feature complexity: Some PDF features are more complex than others, and require more processing power and resources to render. For example, interactive forms, digital signatures, compare PDFs, multimedia content, etc. These features may not work well with some viewers, especially on mobile devices or low-end computers.


To deal with these compatibility issues, we designed our ComPDFKit SDK to be flexible and adaptable. Our SDK allows developers to customize and optimize their PDF applications according to their needs and preferences. Our SDK also supports a wide range of PDF features and standards and is compatible with the most popular PDF viewers.

The Cooperation


UWP (Universal Windows Platform) is a platform that allows developers to create apps that can run on various Windows devices, such as PCs, tablets, phones, and Xbox. UWP apps have many advantages, such as a unified user interface, adaptive layout, cross-device compatibility, and access to Windows features and services.


They wanted to create a UWP app for PDF editing and annotation, signing, etc. They searched on Google for PDF SDKs for UWP, and he found our ComPDFKit SDK. He was impressed by our SDK's features and capabilities, even though our brand was not very well-known. He communicated with the ComPDFKit team and get a free trial.


They integrated ComPDFKit API into their UWP app to access the Windows features and services that they wanted. 


ComPDFKit's annual subscription plan gave them access to our regular updates, bug fixes, and technical support. He was happy with our service and support.



We are glad that we could provide our customers with comprehensive PDF technologies with our ComPDFKit SDK which shows reliable compatibility across various PDF viewers. Except for the UWP Windows apps, ComPDFKit supports being integrated into any application like WPF Windows, Web, Android, iOS, Mac, Linux, etc. 


Contact the ComPDFKit team for more information or a free trial.