Save the app on your cellphone/tablet

Step 1: Go to your iphone or ipad's browser with the homepage of the website loaded.
Step 2: Click the arrow on the bottom of your browser Tap the share icon in Safari
Step 3: After clicking the arrow, a pop up should have appeared.

In the pop up, "Add to Homescreen" should be one of the options. Click that. Tap "Add to Home Screen" in the share menu
Step 4: Write whatever label you want to see for the website's icon Name the icon and tap Add

Then the icon should pop up in your homescreen like a regular app. And you should be able to open and use it like a regular app.

Royal Guild icon on an iPhone home screen
Step 1: Go to your android cellphone or tablet with the homepage of the website loaded.
Step 2: Click the three dots on the top right side of your browser Tap the three dots in Chrome
Step 3: After clicking the three dots, a pop up should have appeared.

In the pop up, "Add to Homescreen" should be one of the options. Click that. Tap "Add to Home screen" in the menu
Step 4: Then another pop up will come up – click Install App (or create shortcut, if you prefer that) Tap Install to confirm

Then the icon should pop up in your homescreen like a regular app. And you should be able to open and use it like a regular app.

Royal Guild icon on an Android home screen