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.
I wouldn't bother, I've had so many problems over the years and it's always when it's dark, raining and cold. I can't remember the last time I heard of wheels being stolen off a car. If they want them they can get a locking but removal tool for a few £ from Halfords etc anyway.