Sadly, a pretty amateur effort.
The input form could be designed to establish the council name and address from the PCN number but does not. This information has to be input manually.
The list of grounds for appealing is limited and did not include the grounds I am appealing.
The app contains a blatant spelling error.
So you pay your £3.99 and get a PDF template letter and get limited suggestions as to what grounds you can appeal on.
And the template letter uses the American date format.
Whilst the idea is good, it is clearly written by someone who wants to make money by writing an app rather that anybody with any parking knowledge.