You can install our site as a web app on your iOS device by utilizing the Add to Home Screen feature in Safari. Please see this thread for more details on this.
Note: This feature may not be available in some browsers.
also even though it states it COULD take up to 1 hr and 40 minutes, more often than not it is done within 20 to 40 minutes, indicating the same message is used for small updates as the larger ones.