Do you feel stressed, anxious or unfocused? Do you have trouble falling asleep? A simple paced breathing exercise can help you in a few minutes.

Let Kardia guide your breath with sounds and the calm movement of the sphere. Feel your body and mind relax, and your heart rate vary in harmony with your breath. This powerful and simple exercise is accessible to everyone, including kids.

- Stress relief
- Calm down anxiety attacks
- Cardiac coherence
- Sleep aid: fight insomnia by focusing on slow breathing
- Deep relaxation
- Meditation sessions and sophrology exercises
- Concentration improvement

- Breathing rate between 5 and 7 cycles/min, with inhalation-exhalation ratio setting
- Exercise duration between 1 minute and 1 hour.
- Usable without looking at the screen thanks to guiding sounds

During ten days, try those exclusive features for free:
- Large choice of high quality relaxing sound sets
- Breathing rate between 1 and 15 cycles/min
- Target mode, allows to slow down or speed up breathing rate during the session
- Advanced mode, with 0.1s precision on inhalation and exhalation durations

Unlock all those features with a single in-app purchase.

With Kardia, you can practice heart rate variability (HRV) training through paced breathing. By breathing at a specific rate, around 5.5 cycles/min, your HRV increases and becomes regular. This state is known as cardiac coherence, or cardio-respiratory coherence. Many scientific studies have demonstrated that it has beneficial effects on stress and anxiety level, blood pressure, depression and sleep.

The best breathing rate is different for everyone. With Kardia, you can set very precisely the exercise frequency, so you will just need a few tries to find out the value that gives you the best results.

What's New

Version 2.2

- Fixed bug that could prevent the end session sound from being played.

Ratings and Reviews

4.8 out of 5
27 Ratings
27 Ratings

Love it!

Instant stress relief. Better than drugs. The effects are quite noticeable, it's easy to do and it only takes a few minutes so be sure to run the whole cycle to fully experience the benefits. In times of stress I can simply open this app and touch "play," thanks to the beautifully simple design. My body needed one or maybe two breaths to get comfortable with the rhythm at the very beginning, but what has followed ever since then is bliss. Just inhale and exhale in time with the dot and music as it expands and contracts. Your brain will do the rest.

The ninja bomb

Perfect and customizable

WOW. This is exactly what I have been looking for. It is extremely easy to customize, and I love that you can set it to ease into a slow breathing rate. The instructions are amazingly clear and detailed The sounds are also wonderful. How fun that you can pick your own color. This makes me want to meditate by breathing.



I love things that are simple and elegantly designed. And of course they have to work, too. This app is all that, plus it’s effortless to use, is customizable, and gets results in a surprisingly enjoyable way. Hands down, one of my all time favorite apps.


Olivier Tache
63.2 MB
Health & Fitness
Requires iOS 7.0 or later. Compatible with iPhone, iPad, and iPod touch.
Age Rating
Rated 4+
© 2015-2017 Olivier Tache
In-App Purchases
  1. Unlock Kardia $0.99


  • Family Sharing

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

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