EU regulators cleared Google's plan to buy fitness tracking device maker Fitbit after the company promised to silo off user data and not use it for advertising.

The U.S. tech giant also pledged to ensure Android phones can continue working with other smartwatches and wearable devices and that health and fitness apps would still be able to access Google and Fitbit data.

Google made the commitments, which last for at least 10 years, to get approval from the EU after the bloc's competition watchdog launched an-depth investigation of the $2.1 billion deal this year.

Human rights and consumer groups had called on authorities to block the deal, citing privacy and antitrust concerns. The EU was initially worried the deal would expand Googles data advantage and raise barriers for rivals in the online ad industry.

The EU's competition commissioner, Margrethe Vestager, said she approved the deal because Google's commitments will ensure that the market for wearables and the nascent digital health space will remain open and competitive.