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.
It's been tough to do, Tesla has made so many changes to the seats / patterns, making it messy to make kits. That said, we do customs on S / X, but that's a bit pricier - let me know if we can help!