After visiting the Web Bluetooth app for the first time, an internet connection is not required for future visits to the Web Bluetooth app. This is because the Web Bluetooth app is cached (downloaded in the background) on your phone/computer so it becomes available to use when offline. If you have an internet connection when visiting the Web Bluetooth app it will automatically check for a new version and if an update is available it will download the new version in the background. The new version will be used on the next visit to the Web Bluetooth app. The latest version of the Web Bluetooth App is v0.0.30.