I bought an IPad in February of 2013 which came with
IOS6 and has since been upgraded to IOS7 and shortly will be
upgraded again to IOS8 so the IPad is relatively a new one.
There would be some logistical issues with getting the
rear-facing camera looking at the print one wants to read, but
my main concern is that no IPads are listed yet at all as
supported devices. Should I wait a bit or is the app likely to
run just fine?

Martin