Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
This will still go through the computer, so no saving on the data usage...You could add this extension to your Chrome browser, then "save to Google Drive" will appear on your right-click menu.
https://chrome.google.com/webstore/detail/save-to-google-drive/gmbmikajjgmnabiglmofipeabaddhgne