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.
My friend had his screen get the yellowing on his S and got fed up waiting on Tesla to sort it out. Ended up buying a UV lamp on Amazon and let it run over night. It wasn't a perfect fix but made a huge improvement for the £40 cost. If you want me to find out what he bought let me know and I'll ask.