We were looking for PDF SDK TO update our product for our users. ComPDFKit has PDF technologies for years. You can see their own app "PDF Reader Pro". So, we decided to have a business relationship with them. They always make sure to meet your needs and talk about their own situations with you. I think it's important to be honest and patient. After we integrating the SDK, our product could get into market on time. No doubt that you could trust ComPDFKit.
