Aurora Forecast: Auroline

Most aurora apps show you a number. Auroline tells you whether you will actually see anything tonight. A Kp index is a global average from three hours ago. It cannot know that it is overcast where you are standing, that the moon is up, or that it will not be properly dark for another two hours. Auroline fuses all of it into one word. ONE VERDICT, NOT A NUMBER GO, MAYBE, WAIT or SLEEP — worked out from the auroral oval at your geomagnetic latitude, live cloud cover, moon illumination and altitude, and the astronomical darkness window for your exact position. Tap once and every factor is there: what each one contributed, what the raw feed said, and when it was measured. Shallow when you want an answer, deep when you want to argue with it. A SKY YOU CAN PLAY Zoom out and the map becomes the globe — real Apple Maps imagery, the day/night terminator, and the auroral oval drawn across it.…