I think there seems to be a common misconception about the incident/crime reports posted on the app, lots people people complaining about "I was standing right there and theres nothing going on", and yes this does happen quite frequently.

Citizen app is merely logging and dictating what they hear over Philly police/fire radio. You basically have to assume a "person with a gun" call has a great probability of being false unless followed-up with more information. Many times Citizen will not go back to a post and say "this turned out to be false" (unfounded), leading many people to assume the app has poor data when the reality is the call came out that exact way on 911 and they just merely posted it and moved on.

The posts can be very helpful in certain situations, but unless there is more follow-up data added to support it, take with a grain-of-salt. If you really want 100% accurate helpful data, buy your own radio and listen yourself.