Samsung

Step 1:

Go to Banditcalc.web.app

Step 2:

Click the "≡" on the bottom of the page

Step 3:

Select "Add Page To"

Step 4:

Select "Apps Screen"

. YouNote that the app will appear on your Apps Page, you will need to drag onto home page if desired.

Iphone

Step 1:

Go to Banditcalc.web.app

Step 2:

Select the "Forward" button on the bottom

Step 3:

Scroll to "Add to Home Screen)