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.
My experience so far has been that if you don’t connect to WiFi to install, after 3 days it will download over Premium connectivity. I don’t have WiFi at my cabin and have had 3 software updates pushed over the air.