Progressive Web Apps (PWAs) hit the scene promising fast and reliable experiences to users without having to use a web browser or visit the app store. They were the theoretical answer to the discoverability problem of native apps and the reliability issues of responsive websites. However, depending on the version of iOS or Android you are using when you access a PWA, you may have a relatively full featured experience or a severely handicapped one. So what are the advantages and limitations of PWAs and when should you use them?