This application requires iOS XX.x or later
After doing a bit more googling and a suggestion here I found a work around. 

It appears the AppStore will not offer you the older version of the application if you have not downloaded it in the past (ie own it already). So the solution is,


Log in to the appstore from an up to date device (borrow one if you must).
Download the app you need.
Go back to your older device and locate the app in the appstore.
The icon to download the app should now be a cloud with the down arrow.
Press the cloud button and it will advise you that it will download the older version.