Bright light high in atmosphere shot across the sky on a straight trajectory faster than anything I've ever seen

I get to work early every morning and always take time to stargaze using an astronomy app. Over the last week and a half I've seen three different anomalous lights on three separate occasions. This was the third. It was a bright light, slightly larger and brighter than Mars that appeared to be high in the atmosphere. It entered my vision from the south and was heading northwest by my best guess. The light was a white/yellow steady glow that didn't blink or flicker. It flew in a straight trajectory faster than anything I've ever seen. It had a slight red tail. It looked like a shooting star but it was moving perfectly straight and it never faded or burned out it just flew out of view. I had an immediate instinctual reaction. I knew, I felt it's weirdness. I've seen this same light acting weird three times in the last week. I'll report the other two with descriptions as well