Our SDKs offer a flexible trial experience. You have the option to try our SDK with or without obtaining a trial key. The no trial key option is perfect for developers who want a quick look at all of an SDK's capabilities. However, it's important to note that this method comes with certain limitations: A red watermark will appear at the top of each page when viewing documents. If any alterations are made to a document, such as adding annotations, the red watermark will become a permanent fixture of the edited file. After running the app for one hour after a document is loaded, the viewer will show an alert. By obtaining a 30-day trial key, you'll unlock the SDK's full capabilities for 30 days without any of the aforementioned limitations.