Contact
One address for corrections, suggestions and questions.
A fact has changed
Name the app and the fact, and link the maker's own page that shows the current value. Prices, free-plan limits and privacy policies change most often.
An app you'd like compared
Tell us which one and how it listens. New apps are added once their facts can be checked on their own pages.
Anything else
Something unclear, a page that doesn't work on your device, or an idea for a guide.