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.
Are you referring to "Prec.N/A" on the screen? I see the same thing and not sure what it is for. I also notice the battery % in the dashboard is always 1% higher than actual. 🤣