On iPhone: open suzyai.net/dashboard in Safari, tap the Share icon (the square with an arrow), then "Add to Home Screen."
On Android: open suzyai.net/dashboard in Chrome, tap the three-dot menu, then "Add to Home screen" (sometimes labeled "Install app").
Either way, you'll get an icon on your home screen that opens straight to your dashboard - no typing the address or digging through bookmarks.