When Pokemon GO first released, that tracker in the corner was every trainer's lifeline to their adventure. Seeing a Pokemon pop up and watching the leaves go down as you moved closer was the best. Unfortunately, it was glitched and has been removed for the time being. Without it, Pokemon GO is even more random and sort of unbearable. Nothing is worse than seeing an outline for a Gengar and having absolutely no idea which way to go. Hopefully Niantic has that all sorted out by the time some Legendaries start rolling around.