The community based Pokemon Go tracker Poke Radar uses some Algorithms to make spotting Pokemon near you faster.
Poke Radar was one of the first Pokemon maps. It has always been based on user reporting the location of Pokemon. This way it never ran into troubles with Niantic, like the much more popular Pokevision map. The team behind Poke Radar continues to improve Poke Radar and added recently predictive algorithms.
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The user submitted data of Pokemon locations can be used to predict when and where Pokemon spawn. Poke Radar, which is available as browser app and as $0.99 iOS app in iTunes (Rank 14 in paid apps) had some server issues in the past 24 hours. The developers have resolved the issues and are back working on new features.
Using Poke Radar could still be called cheating, but it is malign compared to using bots or the hacked Pokemon Go++ app that incorporates now a live Pokemon map. Poke Go++ is an impressive app that enhances the standard Pokemon Go app. It can be installed on any iPhone. There is no jailbreak necessary.