Would helicopters coming in and out of Philadelphia use the tower channel or the tracon app dep channel or the helicopter Unicom channels can anyone help me out on this just wanted to know if I should include these in my radio.
They would use the same frequencies as low altitude fixed wing aircraft, so the same tower freqs, approach control, and en-route freqs. They're probably going to be VFR, so there might be VFR corridor frequencies to listen to.
Go to a nearby pilot supply shop and pick up the local sectional charts. The frequencies of interest will be listed on the chart. If there are any dedicated ATC frequencies for helicopters, it would be listed on the sectional chart. CTAF frequencies for small airports would be used, as well.
What you won't find on the sectional is things like FBO frequencies.