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.
The upgrades screen in the app now has the following text:
The upgrades page on the website has been updated with the relevant FAQ. Premium connectivity purchases are not eligible. Full FAQ entry:
Curiously, there's no mention of upgrades purchased through the website. I don't have any...