That is a really interesting question for software developers by https://mlsdev.com/blog/how-to-create-a-video-streaming-website? There are two primary categories of testing software: unit testing and end-to-end testing. Unit testing involves looking at the functionality of the app in a isolated environment, and comparing it to the final software release. Companies that provide devops services can use tools to build " Simulator Apps" that test the app in a device environment similar to what would be used by actual users. Both these options are useful, but there are differences between them.