Progressive Web Application
Platform-specific applications, are known for being incredibly rich and reliable. They're ever-present, on home screens, docks, and taskbars. They work regardless of network connection. They launch in their own standalone experience.
They can read and write files from the local file system, access hardware connected via USB, serial or bluetooth.
Interact with data stored on your device, like contacts and calendar events.
In these applications, you can do things like take pictures, see playing songs listed on the home screen, or control song playback while in another app.