Avoid

Found no speed traps, however it did put a substantial drain on my battery even when it was not running (location services obviously). STD is a pretty good name...

UPDATE. I see that in the description it suggests stopping GPS service to preserve the battery. Thats right, you have to manually go into your phones settings and stop location services when youre not using it. Seems to me that even if it worked that wouldnt be worth it.

Mark Arson about Speedtrap Detector USA