Tracking flights is a bit of a pain. Siri can do it, and if you’re a real plane spotter, you might even trouble yourself to find an app to do it. But for most of us, we track a flight once in a while, whenever someone’s coming to visit. We just want something that is simple to use, and the disappears. That something is TodayFlights, a neat app that adds a flight tracker to the Mac’s Notification Center Today View.