# CardioZen : Cardiac Coherence Everywhere

> Coherent breathing training guide for stress management and improved physiological balance. (iPhone/iPad app by Symbiofi.)

- Source: https://appshunter.io/ios/app/cardiozen-cardiac-coherence-everywhere/id593054863 (this page in markdown: same URL + `.md`)
- Developer: [Symbiofi](https://appshunter.io/developer/343620436)
- Category: Health & Fitness, Medical
- Price: Free
- Rating: 3.70/5 from 3 App Store ratings · 41 written reviews indexed
- Age rating: 4+
- Requires: iOS 6.1 · 55 MB
- Languages: American English, French (France)
- Released: 2013-01-19
- Data updated: 2026-06-10
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/cardiozen-cardiac-coherence-everywhere/id593054863/reviews.md

## What is CardioZen?

CardioZen : the Coherent Breathing training guide.

Cardiac Coherence encounter a growing interest among people and professional.
Previously applied in cardiovascular prevention, it usage spreads in the emotional response management programs, stress and sport.

When facing stressful demands of everyday life, cardiac coherence strengthens the adaptability of physiological self-regulation system to fight against psychological and physical problems, allowing the body to maintain a better inner balance.

AUTONOMIC NERVOUS SYSTEM (ANS) ROLE

Originating from lymbic system, the seat of emotions, Autonomic Nervous System take care of:
- Controling principal organs: eyes, heart, lungs, stomach ...
- Homeostasis: regulating and maintaining balance and physiological stability.

The SNA is composed of 2 opposite parts acting balancing the effect of each other:
- The Sympathetic Nervous System is associated with action : it prepares the body to act and react.
- The Parasympathetic Nervous System is associated with rest : it slows body functions ot preserve energy.

Un SNA flexible permet à l’organisme de maintenir l’homéostasie, face aux sollicitations stressantes externes (environnement) et internes (émotions, douleur…). A l’inverse, le manque de flexibilité expose à différentes manifestations somatiques et psychologiques.

A flexible SNA allows the body to maintain homeostasis, in order to deal with external (environment) and internal (emotions, pain …) stressful demands. On the contrary, the lack of its flexibility expose to various somatic and psychological symptoms.

Recent clinical studies stress the fact that a rigid SNA, can be mainly explained by a lower parasympathetic nervous system tone, also called vagal tone.

CONSEQUENCE OF A LOW VAGAL TONE

Studies show a significant decrease in vagal tone in people with:
- Diabetes, hypertension, asthma or with inflammatory or chronic painful diseases;
- chronic or generalized anxiety, generalized anxiety, panic attacks or post traumatic stress disorder

Different triggering mechanisms, now better known, are involved: the reflex phenomena of regulation between heart rate, respiration and blood pressure and the neurobiological mechanisms of the brain associated with stress and emotions.

INCREASING VAGAL TONE

There is a simple and easy way for us all to increase our vagal: breathing.

Regular training in breathing control makes it possible to optimize this system - also known as baroreflex – by synchonizing the heart, breathing and blood pressure rate.

An increasing or decreasing blood pressure, blood vessels wih trigger, through the SNA, the heart rate acceleration or deceleration.
This physiological phenomenon can be optimized with a 6 cycles per minute (cpm) breathing: whith a 4.5 seconds inhalation and a 5.5 seconds exhalation.

This slow, steady and guided breathing enables synchronizing breathing variations with baroreflex activity, enhancing vagal tone and maximizing the adaptability of the ANS.
This synchronicity is called Cardiac Coherence.

BENEFITS
Cardiac coherence training increases vagal tone and enhances the flexibility of the SNA, allowing the body to better maintain homeostasis and fight against psychological, physical and psychosomatic problems.
Recent studies shows us the interest for:
- Enhancing emotional response toward stress
- Reducing Myocardial risk 
- Improving Lung capacity 
- Reducing Respiratory disorders
- Relieving Fibromyalgia
- Reducing perceived physical pain
- Improving depression and anxiety treatment
- Reducing high blood pressure

## Key features

- Coherent breathing guidance
- Stress management tool
- Autonomic Nervous System balance
- Vagal tone enhancement
- Physiological self-regulation training

## Recent user reviews (10 of 41)

All indexed reviews: https://appshunter.io/ios/app/cardiozen-cardiac-coherence-everywhere/id593054863/reviews.md

### 1/5 — Disparition des capteurs et des autres  applications

*2024-07-17, version 1.2.6*

Bonjour
J'étais très satisfaite de 4 applications avec le capteur sur le doigt grâce à l'appareil photo.
Elles me permettaient de gérer mon stress avec des exercices de cohérence cardiaque.
Une net amélioration avait faite sur ma respiration avec un entraînement quotidien.

Comment obtenir à nouveau ce service sur mon téléphone ?
Avez vous changé le nom de l'application ? Du fournisseur ?

### 1/5 — Ne fonctionne pas

*2022-01-16, version 1.2.6*

L’application ouvre à l’envers sur un iPad c’est pas le fun et en plus elle ne démarre plus dommage car elle a fonctionne 3 ou 4 reprises et c’était bien j’aime le bruit des vagues pour faire la cohérence

### 1/5 — Une arnaque..ne fonctionne pas .. 5 euros de perdu

*2020-01-25, version 1.2.6*

On rentre dedans et dès que l’on souhaite l’utiliser cela nous sort de l’application...une arnaque

### 4/5 — Ajustement du volume

*2019-09-27, version 1.2.6*

Superbe application! Je souhaiterais toutefois avoir un contrôle du volume des effets sonores indépendant du volume de ma sonnerie de téléphone.

### 1/5 — Ne fonctionne pas

*2019-04-05, version 1.2.6*

Plante à chaque fois malgré des réinstallations répétées.Dommage car l’ idée est bonne.

### 5/5 — T.bien

*2018-04-27, version 1.2.6*

Agréable et efficace ...

### 4/5 — Pas mal, mais dommage qu'il n'y ait pas un mode audio

*2017-06-30, version 1.2.6*

Premier essai d'une appli que cette technique de relaxation. Appli très simple, et premiers essais efficaces pour se détendre. Dommage qu'il n'y ait pas un mode purement audio : c'est assez contreproductif de devoir allumer l'écran pour l'utiliser pour l'endormissement. Par ailleurs, j'ai un peu de mal à identifier les fins de cycle inspiration-expiration. Peut être une habitude à prendre.

### 4/5 — Très efficace pour relaxer

*2016-07-19, version 1.2.6*

J'adore cette application. 
Interface à corriger car est à l'envers à l'ouverture. Avec un iPad ce n'est pas évident surtout quand notre étui n'a qu'un sens.

### 1/5 — BUG

*2016-07-12, version 1.2.6*

Ne fonctionne plus sur IPAD pro

### 2/5 — Bugs à corriger

*2016-07-03, version 1.2.6*

Pourrait être intéressant, malheureusement plusieurs boutons ne répondent pas.

## Frequently asked questions about CardioZen

### What is CardioZen used for?

CardioZen is a training guide for coherent breathing, designed to help users manage stress, improve emotional responses, and strengthen the adaptability of their physiological self-regulation system.

### How does CardioZen help with stress?

By guiding users through specific breathing patterns, CardioZen aims to synchronize heart rate, breathing, and blood pressure, which strengthens the vagal tone and improves the body's ability to maintain inner balance when facing stressful demands.

### What is vagal tone and why is it important?

Vagal tone refers to the activity of the vagus nerve, a key component of the parasympathetic nervous system responsible for rest and energy conservation. A higher vagal tone is associated with better physiological self-regulation and resilience to stress.

### What breathing rate does CardioZen recommend?

CardioZen utilizes a breathing rate of 6 cycles per minute, which involves a 4.5-second inhalation and a 5.5-second exhalation, to optimize baroreflex activity and enhance vagal tone.

### Is CardioZen available on multiple devices?

Yes, CardioZen is supported on iPhone, iPad, and iPod, making it accessible for users across various Apple devices.

### How often is CardioZen updated?

The latest version of CardioZen, 1.2.6, was last updated on July 29, 2015. While updates have not been frequent recently, the core functionality remains available.

### What is the user rating for CardioZen?

CardioZen has a user rating of 3.7 stars based on 3 ratings, indicating a generally positive but mixed reception from its user base.

### Does CardioZen have ads?

No, CardioZen does not contain advertisements, providing an uninterrupted user experience focused on breathing exercises.

## Version history (last 4 releases)

### 1.2.6 — 2015-07-29

This app has been updated by Apple to display the Apple Watch app icon.

English translation
Responsive UI

### 1.1.2 — 2015-06-01

Corrigé : lien vers le Lot Cohérence Cardiaque indépendant du pays de l'itunes store.
Corrigé : centrage du jeux avec fond noir

### 1.1 — 2015-05-21

Changement du lien de perfectionnement
Application bloquée pour iPad 1
Possibilité d'utilisée 2 orientations en mode paysage

### 1 — 2013-01-19

No release notes.

## Apps similar to CardioZen

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Cohevia](https://appshunter.io/ios/app/cohevia/id1520415545) | — | Free | Health & Fitness |
| [Respirotec](https://appshunter.io/ios/app/respirotec/id1489622304) | 4.0 (4) | Free | Health & Fitness |
| [HeartRate+ Coherence PRO](https://appshunter.io/ios/app/heartrate-plus-coherence-pro/id763865838) | 4.1 (117) | Free | Health & Fitness |
| [ZenBreath : Find your rythm](https://appshunter.io/ios/app/zenbreath-find-your-rythm/id1478760034) | 4.6 (111) | Free | Health & Fitness |
| [Well: CBT Journal & Breathing](https://appshunter.io/ios/app/well-cbt-journal-and-breathing/id1584605106) | 4.0 (4) | Free | Health & Fitness |
| [Anti stress breathing exercise](https://appshunter.io/ios/app/anti-stress-breathing-exercise/id1556434348) | 4.9 (40) | Free | Health & Fitness |

## Related topics

[symbiofi](https://appshunter.io/ios/topics/symbiofi)

---

*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*