Having a website shortcut on your iPhone home screen is a great solution, providing an alternative to adding a bookmark directly on your browser or downloading an entire app.

To bookmark your open Safari Tabs, choose Add Bookmarks for XX Tabs. You’ll be able to choose a location and name for the collection on the next page, after which you press save.

Most Android browsers let you add a website shortcut to your home screen. The method to do this is largely similar across browsers and can generally be found in the browser's menu options.