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.
Check you're sharing your data with Tesla and have signed up to the early firmware releases. This might prompt an upgrade in a day or two. Also, strong wifi signal helps, of course.
I've had a Model S for 10 months, no cracks. After about a month it took a real whack from a stone kicked up by a lorry. I was convinced it would be damaged, but no mark left. I'd agree with rsg123.