Since this is not a standard AppStore or Play Store app, you will have to enable it manually. Please see the instructions listed below for enabling this app on your device.
Click the link on this page and click 'Install'
After the app has installed, go to the Settings app on the iPhone and click 'General'
At the bottom of the 'General' settings menu, click 'Device Management'
Click the 'Car-O-Liner' section
Click 'Trust "Car-O-Liner Company"'
Click 'Trust' on the pop-up and you're ready to open your app!
When you see the message saying 'Install Blocked', click 'SETTINGS'
In the menu that pops up, select 'Allow this intallation only' and click 'OK'
You'll be faced with one more screen asking if you want to install the application. Click 'Install'.
When the app is done installing, click 'OPEN' to use your app!