The app is best viewed in landscape Full Screen mode or by installing the app.
Open the
Share
menu (at the bottom or top of Safari)
Then choose
Add to Home Screen
in the menu.
You may see an Install bar at the top of the page the first time you access the web page. Press the Install button.
OR
Open the full Chrome menu.
Choose
or
Install
(The label may vary.)
To ensure PrepSync is the latest version, clear your browser cache, even if you have installed it as an app.
Source: https://support.apple.com/en-us/105082
Source: https://support.google.com/accounts/answer/32050?hl=en