Whisper CEO Michael Heyward has turned more forceful in dismissing allegations from The Guardian that his anonymous app was tracking users, including people who opted out of geolocation before sharing their secrets.

Early last month, Google wrote a seemingly innocuous, jargon-filled blog post about figuring out when a search ad on a consumer's smartphone leads to buying an item in real life—conveniently glossing over the fact that it's doing that by "tracking consumers’ smartphone locations all the time, wherever they go, even when they’re not using a Google app," reports Digiday.