Apple Inc. (NASDAQ:AAPL) recently acquired Beddit Sleep Monitor, which tracks sleep through iPhone or iPad.

Financial terms and other details are unknown at this time.

According to a report from Mac Rumors, an updated privacy policy on the Beddit website says that the sleep monitoring system has been acquired by the Cupertino-based tech giant.

“Beddit has been acquired by Apple. Your personal data will be collected, used and disclosed in accordance with the Apple Privacy Policy,” according to the Beddit privacy policy.

Beddit Sleep Monitor

The Beddit 3 Sleep Monitor, which you can buy for $150 from Apple Inc. (NASDAQ:AAPL), is designed to track sleep as well as heart rate, average resting heart rate, respiration, movement, and snoring. The system works with the Beddit app on iPhone or iPad.

Unlike other activity trackers, Beddit does not require users to wear it. The thin, flexible, and soft sensor is unnoticeable and can be placed under the sheet on top of the mattress. It senses and automatically begins tracking when you lie down on the bed. It collects and analyzes sleep-related data such as sleep time and efficiency, heart rate, respiration, temperature, movement, snoring, room temperature, and room humidity.

The collected data is made available to users through the Beddit iPhone app. It provides “personalized insights” and “customizable sleep coaching” to help users improve their sleep habits.

According to Beddit, the device uses ballistocardiography (BCG) to measure the mechanical activity of the heart, lungs, and other body functions.

“Each time the heart beats, the acceleration of blood through the circulatory system generates a mechanical impulse that can be measured and analyzed. Throughout the night, Beddit tracks each individual heart beat and respiration cycle. Beddit’s advanced analysis and machine learning algorithms adapt differently to each body type and provide detailed sleep data,” according to the Beddit website.

Shares of Apple Inc. (NASDAQ:AAPL) closed up 0.63 on Tuesday. The stock is up nearly 33% so far this year.