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.
You can "subscribe" to FSD for 199/mo USD and cancel at any time, which is a lot cheaper than $12k for outright purchase. So play with the features for a month or two and decide if its worth continuing.