In the context of contacting clearance delivery for an IFR clearance at a class delta airport, I’m a little confused on how Foreflight has worded some things and it’s throwing me off.

I’m use to contacting ground control at my home airport since CD and Ground are the same frequency. I also understand that sometimes they are different frequencies and that’ll be listen in the AF/D.

In this example I’ll be using KDWH and KGLS.

For KDWH, CD is obviously different from ground. Foreflight and the AF/D say the same thing.

For KGLS, this is where my confusion starts. Foreflight says CD is 135.35 when tower is closed. But the AF/D just says to contact 135.35 with nothing about that frequency being for when the tower is closed. AF/D says to call the number when ATCT is closed. So why does Foreflight says something different from AF/D?

If I had to guess on what the correct way to contact CD at KGLS is, I would contact them at 135.35. Is my understanding of this incorrect? TIA.