Apple's Tim Cook says he's also spending too much time with his phone (AAPL)

Justin Sullivan/Getty Images Apple CEO Tim Cook said he spends too much time on his phone. Cook said he discovered his overuse while testing out some new tools the company unveiled Monday at its developer conference that are designed to help users monitor and control the amount of time they spend on their devices. Cook's admission and the new tools come as growing numbers of developers and politicians have been raising alarms about devices and apps encouraging addiction-like behavior among users...