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.
Negative. That "Blind Spot Warning Chime" feature has always been there. You do need to manually turn it on in the "autopilot" settings. It does not chime when you turn on your turn signal, but it will chime as you move into an occupied lane.