Your personal information was probably stolen if you use this very popular service.

On Sunday, Underer Armour, Inc., which owns MyFitnessPal learned that an unauthorized party stole data from 150 million MyFitnessPal user accounts in late February 2018.

Hackers stole usernames, email addresses and passwords, the company said.

"Once we became aware, we quickly took steps to determine the nature and scope of the issue. We are working with leading data security firms to assist in our investigation," the company wrote online. "We have also notified and are coordinating with law enforcement authorities."

Social Security numbers, driver's license numbers and credit card information weren't breached, according to Under Armour.

According to the company, four days after learning of the issue, the company began notifying MyFitnessPal users via email and through in-app messaging.

The notice included recommendations for MyFitnessPal users regarding account security steps they can take to help protect their information.

The company is all requiring MyFitnessPal users to change their passwords and is urging users to change their passwords right away.

MyFitnessPal is a smartphone app and website that tracks diet and exercise to determine caloric intake.

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