Buttons and menus are named exactly as the app shows them.
Steps
Open the install page
The page recognises your browser and shows the one button, or the few taps, it takes.
Where: app.lyfeconnex.com/install
Chrome, Edge, Samsung Internet or Opera
Choose Install. The app gets its own window and icon and opens without the browser around it.
iPhone and iPad
In Safari, tap Share, then Add to Home Screen, then Add.
Mac with Safari
On macOS Sonoma or later, choose File, then Add to Dock.