Back-of-the-envelope math going backwards from the
$60,000 the Iowa Democratic Party paid for this app suggest that Shadow put in less than a handful of person-months of work.
(Presume $100,000 base salary, 1.4x overhead for a salaried employee, $0 profit, all employees working on the project are developers, and no code reuse with any other project. Some of these assumptions are clearly false, but I think it gives a reasonable guess at an upper bound).
However, seeing as the developers they hired didn't bother changing the default manifest and forgot to prefix a URL with HTTPS, I hope they Shadow at least wasn't paying them that much?