MUJI to Relax

Whenever you want to relax at home, or are in places where it is difficult to sleep, like an airplane or long distance bus or coach,
Muji Ryohin will provide support for your sleep and relaxation time whenever and wherever you are.

Muji to Sleep includes 6 natural sounds to help you sleep,
plus new added functionality that allows you to create your very own relaxation music.

ー About this App ー
This is a sound app that helps you enjoy sleep and relaxation time in way that suits you.
Use Muji Ryohin's "sofa that fits to your body" together with the "fitted neck cushion" to enjoy an even better time of sleep and relaxation.

ー How to Use the App ー
[ 6 Natural Sounds ]
Plays 6 natural sounds that will help you sleep.
6 stereophonic sounds recorded in various regions of Japan will help you sleep and relax.
1. Put on the headphones and start the app
2. Swipe the app and select your favorite sound
3. Set the timer and go to sleep

[ Your Own Unique Relaxation Music ]
Creates your own unique sounds from your heart rate and the time of day.
Provides your perfect relaxation sound selected from an infinite number of sound combinations.
1. Put on the headphones and start the app
2. Tap the plus button on the top left
3. When the light is on, place your finger over the camera and the light to measure your heart rate
4. Once you have taken your measurement, your own original relaxation music will be played.

"Please note that
when playing relaxation music, your device will consume more battery than usual."

ー Important Notes ー
This app uses special sounds known as binaural beats. Therefore, please do not use this app in the following cases:
・If you suffer from epileptic seizures or heart disease (in particular if you have a pacemaker)
・If you are feeling unwell or under the weather
・If there is a change in your condition or suddenly become unwell when using the app
・If you are driving a car or operating a machine
・If you are less than 10 years old

What's New

Version 2.4

Adding the new function which generate the sounds from the data of the latest pulse through apple watch.

Ratings and Reviews

4.5 out of 5
26 Ratings
26 Ratings

Put hyper dog to sleep

Mathis W.

My fiancé and I have a 4 year old long haired chihuahua. She is the most hyper dog you'll ever meet she'll run around in a circle for hours on end without tiring. One day she got into her fits of hyper-ness, so we decided to test out the capabilities of this app. We put the light and camera to her tummy and in less than five minutes she was out cold.

Needs more sound choices


I would like to see a rain sound or a thunderstorm in the distance sound or maybe even a wind-chime sound or something like that. I love the campfire sound it's so relaxing. So yeah there's my opinion... It might change with the next update. Great app to fall asleep with!

Soothing Sounds and Music


I use toRelax while working, and find the sounds and daytime heartbeat music very soothing. However, the drones in the evening and nighttime heartbeat music are dissonant. Also, when I try to add my location, the app crashes. I hope MUJI can fix these issues soon.


172.1 MB
Health & Fitness
Requires iOS 7.0 or later. Compatible with iPhone, iPad, and iPod touch.
English, Filipino, French, German, Indonesian, Italian, Japanese, Korean, Malay, Norwegian Bokmål, Norwegian Nynorsk, Polish, Portuguese, Simplified Chinese, Spanish, Swedish, Thai, Traditional Chinese, Turkish
Age Rating
Rated 4+
© Ryohin Keikaku Co., Ltd.


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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