The easiest way to check  to see if you need to update the Cab Hound app is to visit the app store and find the Cab Hound driver app. If you see a 'Update' button then an update is available. Otherwise, there will be a button called 'Open'. If you see an Open button, then the app has been updated to the most recent version of the app. Attached is a description of how to check for update of the Cab Hound app.