The company behind popular air pollution app AirVisual has said it has been the target of a "coordinated attack", with "abusive and threatening" messages posted on Facebook, as well as the Apple App Store and Google Play Store. In an email to customers, AirVisual, which is based in London, said: "We have received numerous reports from people who are concerned about their privacy being compromised by this malicious activity. Hanoi's Environment Administration recently warned residents to limit outdoor activity.
The company behind popular air pollution app AirVisual has said it has been the target of a "coordinated attack", with "abusive and threatening" messages posted on Facebook, as well as the Apple App Store and Google Play Store. AirVisual said it came after company data revealed Hanoi was, at times, the world's most polluted city, prompting it to take down its AirVisual apps and Facebook page. Hanoi's Environment Administration recently warned residents to limit outdoor activity.