Uber denied Apple's claims that the company tracked mobile devices of former users even after they deleted the app from their phones. Apple alleged that Uber used the banned "fingerprinting" method to track phones, according to the New York Times. Uber CEO Tim Kalanick defended the practice, claiming his staff used the technique as an anti-fraud measure after problems in China. The ride-sharing app has faced a spate of cricitism over the past few months, following allegations of a sexist corporate environment.