Speed Limit alert sounds

I'm really liking the app as a whole. But the speed limit alert sounds are driving me nuts. I'm usually listening to stuff on my phone with it plugged into the radio.

Sometimes I'll be on a road where the limit sign says 40, but the app thinks it's 35. So the alert will sound. Or if I'm on an on-ramp accelerating, the app thinks I shouldn't be, and the alarm will go off.

I even went into the settings to turn it off, but it still goes off. Is there any way to truly turn it off?

 

Correct. It's the hammer gps iPhone app. So far it's pretty good. I'm testing it in places I go to frequently. The alert sound is really my only complaint at the moment.