Niantic Labs and Google are working on a fix for the full access permission being asked by Pokémon Go from iOS users using their Google accounts to play the game. Researcher Adam Reeves first caught sight of this issue but may have apparently over-exaggerated the threat and that he didn’t test if the game really did give access to your email and data from Google. Niantic says they only access basic profile information, which include User ID and email, and they’re not accessing any other Google account information. The issue seems to be affecting only iOS players who use their Google account to play the game. According to Niantic, “Google has verified that no other information has been received or accessed by Pokémon GO or Niantic. Google will soon reduce Pokémon GO’s permission to only the basic profile data that Pokémon GO needs, and users do not need to take any actions themselves.”
Source: Recode