"Over the weekend, Niantic “fixed” this bug by eliminating any way to judge the distance a player was from any given Pokémon. In players' eyes, that was not particularly helpful, to say the least. In fact, many declared that they were going to stop playing the game altogether.Why Pokémon Go players are revolting against the game’s maker - The Washington Post
Even worse for players, Niantic shut down third-party websites that had sprung up to show players where Pokémon were appearing — sites that many players were using to track Pokémon as the game originally intended. The update that altered the tracker also eliminated some other features that players quickly missed, such as the battery saver feature on iOS. Many on social media have said this feature may have been removed because it was often causing the app to crash or freeze. But Niantic has not confirmed that."
Wednesday, August 03, 2016
Why Pokémon Go players are revolting against the game’s maker - The Washington Post
Also see Niantic explains why it killed third-party Pokémon Go tracking services (TechCrunch)