Calabasas, California - Kim Kardashian and Gwyneth Paltrow have challenged each other to the ultimate sleep-off, using sleeping app Oura Ring to track their sleep scores and see who snoozes better.

On Monday, reality television star Kim Kardashian shared a screenshot of her sleep cycle score, which she tracks using popular sleeping app Oura Ring, a device used to monitor the quality of someone's sleep.

Kardashian's data showed that she got an impressive eight hours and 15 minutes of sleep, which the app deemed as "optimal."

The score left Gwyneth Paltrow stunned, and she reposted Kim's results, adding, "Okay WHAT?? I thought I was killing it at this @ouraring game… I guess not..."

The actor followed her post with a snap of her score, which showed that she had got seven hours and 17 minutes the night before, something that she was clearly disappointed by.

"This is my lame a** score," Gwyneth commented in the pic. On Tuesday, The Keeping Up with the Kardashians star kept the fun going and replied to Paltrow on her Instagram story, saying "One thing about me… I can SLEEP!"

She also added a little fuel to the competition by showing off her latest results of nine hours and 36 minutes of blissful sleep.

"I'm just showing off now I know! LOL," Kardashian wrote in a message in which she also tagged Paltrow.

It makes sense for the Goop founder to be competitive when it comes to getting the necessary amount of shuteye, being the huge advocate for health and wellness that she is.

However, it looks like Kim Kardashian may have a few things to teach her when it comes to getting a good night's rest.

Even the company that created the app joined the competition on Twitter and dared anyone to beat Kim's score with the hashtag #cananyonebeatKim.