*** WARNING *** The new Nearby list does not include Sightings. At all. Only spawns near Pokestops. So this app is no longer useful if you are in an area where the new tracker has been released. Once it is released worldwide, this app will be removed from the store. Please feel free to submit feedback to Niantic with your thoughts on the "beta" Nearby tracker. ******
PokeRadius is a simple tool to help locate Pokemon in Pokemon Go using your Sightings list. When a Pokemon you wish to track appears in your Sightings list, switch to PokeRadius and mark the initial sighting location. As you walk around, tap the icon to mark whether the Pokemon is still in or not in the Sightings list. PokeRadius narrows down the possible locations on the map to the area shaded in green. With a little practice you can find the Pokemon quickly and easily.
It supports "shake to undo" and can toggle between street maps or satellite imagery.
It does NOT interact with the Pokemon Go game servers or app, and does not require any account login - it just draws circles on a map. It doesnt violate any terms of service. It does NOT find Pokemon that are not initially within the 200 m sighting radius - its not that kind of "tracker". Its an easy-to-use alternative to the gone-but-not-forgotten "three steps" in-game tracker.