Does NOT automatically update your location
Despite what it might seem reading the description, this app does NOT update your location automatically using the GPS. You have to click and drag on a map manually to tell it where you currently are (I seem to remember that previous versions were different in that regard). So say you travel to a nearby place (near enough that the time difference won't call your attention) and trust this app to tell you sunrise/sunset time without updating manually your location: you'll be hosed.