Apple has acquired Finnish sleep tracking firm Beddit, a startup which created a sleep sensor to monitor people’s sleep so they can analyse their sleeping habits.

As first reported by CNBC, the startup updated its privacy policy to state that it has been acquired by Apple – though it doesn’t mention the terms of the deal, so it’s anybody’s guess what Apple intends to do with the firm or its technology.

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

The Beddit 3 sleep monitor, optimised for iOS, is placed under the sheet on top of the mattress – automatically beginning tracking once the user lies down on the bed. It syncs sleep time, heart rate and respiration data with the Apple Health app – this data can then be used in other fitness and health apps – while its smart alarm is said to be able to wake users up ‘at the right time’. It is currently for sale on the Apple website for $149.95.

The company also has an existing Apple Watch app, though this page has been removed from its website.