This article will explain how to install the Zenbooker web app on your phone.
Android
On your Android device, open Chrome
Go to Zenbooker.com/apps
Log in if necessary
Tap "Install" and then tap "Install" again when the pop-up appears
iOS
On your iPhone or iPad, open Safari
Go to Zenbooker.com/apps
Log in if necessary
Click on the Share icon—the box with an arrow in it. This button is at the bottom of the screen for Safari users, and for Chrome users, it's at the top-right of the screen.
Scroll down and tap "Add to Home Screen"
Tap the "Add" button at the top right of the screen