Below please find detailed instructions for doing so on Apple and Android devices, respectively.
Launch the Safari browser on Apple’s iOS and go to your URL for the Hats & Ladders app. Do NOT click the “Sign In With Google” button. Tap the Share button on the browser’s toolbar — that’s the rectangle with an arrow pointing upward. It’s on the bar at the top of the screen on an iPad, and on the bar at the bottom of the screen on an iPhone.
Tap the Add to Home Screen icon in the Share menu. You’ll be prompted to name the shortcut before tapping the Add button. The shortcut can be dragged around and placed anywhere, including in app folders — just like a normal app icon. Now, you can open Hats & Ladders from the home screen and sign in.
Launch Chrome for Android and go to your URL for the Hats & Ladders app. Do NOT click the “Sign In With Google” button. Instead, tap the menu button and tap “Add” to home screen. You’ll be able to enter a name for the shortcut and then Chrome will add it to your home screen. Now, you can open Hats & Ladders from the home screen and sign in. If you are having trouble adding the app on android read this article.