When the FTC alleged that period tracking app maker Flo Health shared people's private health information with Facebook and Google without permission, its settlement with the company required some changes in how it gathers and uses people's data. But some believed it was just another example of a feeble approach to enforcing the agency's authority. The settlement soon led to a controversial enforcement policy update that could affect countless health and fitness app makers. And that was just one sign that the FTC is getting tougher on tech firms. It's already forced two companies to destroy their algorithms.