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 was assigned a VIN yesterday (6/5) and automatically scheduled to pick up on Sunday (6/7). Not sure if it is this quick because I'm in the Bay Area. It will be contactless pickup at the Fremont factory.