For more information please see the following resources:
Android is a trademark of Google Inc.
iPad, iPod, iPhone and Safari are trademarks of Apple Inc., registered in the U.S. and other countries.
Webapps are just loaded like normal web sites. Just enter the web address (URL) of the webapp in your web browser. For restart just bookmark the webapp. You can also add an application shortcut icon to your home screen:
Home screen icon on iPhone/iPad/iPod
Home screen icon on Android™ devices
Start screen tile on Windows Phone