# BellyBio Interactive Breathing

> Interactive biofeedback app for deep abdominal breathing with synchronized music and light. (iPhone/iPad app by RelaxLine.)

- Source: https://appshunter.io/ios/app/bellybio-interactive-breathing/id353763955 (this page in markdown: same URL + `.md`)
- Developer: [RelaxLine](https://appshunter.io/developer/352027981)
- Category: Health & Fitness, Medical
- Price: Free with in-app purchases
- Rating: 4.00/5 from 40 App Store ratings · 75 written reviews indexed
- Age rating: 4+
- Requires: iOS 7.0 · 201 MB
- Languages: American English
- Released: 2010-02-20
- Data updated: 2026-07-19
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/bellybio-interactive-breathing/id353763955/reviews.md

## What is BellyBio Interactive Breathing?

Put the iPhone on your stomach. Breathe deeply. Enjoy...

FOR ADVANCED BELLY-BREATHERS ONLY

BellyBio (Belly Biofeedback) is a triple innovation in deep abdominal breathing, biofeedback and music:

1 – DEEP BREATHING GETS ADDICTIVE
BellyBio generates beautiful music & light perfectly synchronized to your deep abdominal breathing movements, making deep breathing more pleasant and rewarding than ever. You're going to love playing with your inner balloon.

2 – BIOFEEDBACK GETS SIMPLE
BellyBio turns your iPhone/iPod Touch into a highly-sensitive deep breathing sensor providing a real-time, objective stress-level index based on your breathing pattern. Biofeedback thus becomes more simple and powerful --not to mention affordable-- than ever, so you can now know for sure who's the coolest dude in the neighborhood.

3 – MUSIC GETS BREATHABLE
The first "Abdominal Music Player", BellyBio makes music play in sync with your breathing, which in return makes your breathing calm down. Is it you who follow the music or the music that follows you? You don't listen to music anymore, you merge with it.

IMPORTANT NOTICE -- Practicing BellyBio will require you to:

a) BE ABLE TO NATURALLY BREATHE DEEPLY AND SLOWLY FROM YOUR BELLY, meaning your belly --and not your chest-- must significantly and effortlessly inflate when you inhale and deflate when you exhale. If you can't, you'd probably better not download this app since nothing is more annoying and ineffective than struggling to achieve deep abdominal breathing (and by the way this will perhaps avoid somewhat angry customer ratings... ;-))

b) PROPERLY POSITION THE iPHONE ON YOUR PELVIS, FACE UP, SO AS TO MAKE IT TILT BACK & FORTH when you breathe deeply in & out from your belly (BellyBio measures the increase/decrease of the angle between the iPhone and your body). The bottom of the iPhone should rest still on your pelvis while the top moves up and down with your lower belly as you breathe in & out. 

WATCH THE IN-APP DEMO to see how it works (www.youtube.com/bellybio).

The app is quite heavy (170 Mo) due to the multiformat music base. Wifi is required to download it.

==========

FEATURES
- Several interactive musical themes you can breathe deeply in and out (i.e. have BellyBio play in sync with your deep abdominal breathing)
- One of those themes (“Calmitude pitch”) provides you with a direct audio stress-level feedback through the pitch of the inhaling tone (the lower the stress, the lower the pitch)
- Choice of breathing colors displayed in sync with each in- and out-breath
- Graph showing real-time breathing and stress curves
- Log (date, duration of use, minimum stress, minimum breathrate, Qi production)
- 3D-earth animation showing all BellyBio users on the planet
- Whether you have an iPhone or an iPod Touch, the main home button must always be close to your lap, not to your chest.
- Child-proof (successfully tested on 5-year-old with adult assistance)

QUOTES (sort of)
- "All thumbs and navels up!!!" (Buddha, India)
- "BellyBio rests on the belly just like the leaf floats on the sea." (Lao Tzu, China)
- "Bellissimo BellyBio!" (L. Da Vinci, Italy)
- "To breathe or not to breathe? To breathe, period. With BellyBio!" (W. Shakespeare, UK) 
- "I play BellyBio, therefore I stop thinking, therefore I am." (R. Descartes, France)
- "So cool!" (I. Newton, UK)
- "Makes me wanna compose a dozen sonatas and concertos for BellyBio! Please give me 10 minutes." (W. A. Mozart, Austria)
- "Even with only one ear, this thing just blew my mind!" (V. Van Gogh, Netherlands)
- "Undoubtedly absolute." (A. Einstein, Germany)
- "Why didn't they call it iBelly?" (S. Jobs, USA)

WARNING
This application is not meant to substitute for medical diagnosis and/or treatment. Should you feel any pain or discomfort, please stop immediately and consult your physician or health professional.

## Key features

- Interactive musical themes synchronized with breathing
- Audio stress-level feedback
- Breathing color synchronization
- Real-time breathing and stress graphs
- Breathing and stress logs
- 3D Earth animation of users

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Angels Club | $0.99 | one-time |
| Brownian Dream | $0.99 | one-time |
| Metronomia | $0.99 | one-time |
| Highlands | $0.99 | one-time |


## Recent user reviews (10 of 75)

All indexed reviews: https://appshunter.io/ios/app/bellybio-interactive-breathing/id353763955/reviews.md

### 5/5 — Psychologist approved!

*2024-06-07, version 1.1.3*

I’m a psychologist and I recommend this to so many of my clients AND I use it myself. It is helpful for so many things, any strong emotion, restlessness, insomnia, pain etc!

### 5/5 — Thank YOU !

*2024-02-27, version 1.1.3*

It’s BACK :) !! As as biofeedback therapist, Belly Biofeedback is the ONLY app that give quantifiable information about your breathing rate (goal: 4-6/bpm). Thank you for the upgrade to iOS 8 !!!! It IS the Best…...

### 1/5 — Terrible

*2024-01-04, version 1.1.3*

It keeps saying irregular breathing no matter how many times I "adjust "the phone. Then it shuts off. I have to restart it again and again it just is like a big PITA..

### 1/5 — Won’t open on iPhone 14

*2023-01-28, version 1.1.3*

Will download but won’t stay open.

### 5/5 — Amazing!

*2023-01-25, version 1.1.3*

Doesn’t matter that this app is never updated. It serves its purpose perfectly and is amazing for beginners like me who is just starting with belly bio breathing. I can’t believe how it is able to track my breathing and play music to encourage me if I’m on track. Super innovative app and totally worth the try. Did I mention it’s free?!?!

### 5/5 — Long time BellyBio user

*2022-10-23, version 1.1.3*

I’ve been using this app for years and it still holds up as one of the greatest biofeedback apps out there. People are definitely sleeping on it when they scroll by. Thank you to the developers for continuing to update it when iOS updates. You guys are awesome.

### 5/5 — belly bio is love, belly bio is life

*2022-08-22, version 1.1.3*

The. Best. App. No contest. Yeah the interface looks like a geocities website but who cares, it's part of the charm. 
The app is genuinely amazing and could help so many people. There isn't another one like it. I know the same developers made Lull, but it just isn't the same. 

I honestly don't know why more app developers haven't thought of this idea, but for real--it's the most helpful app I've ever downloaded. 

With some little updates and tweaks, it'd be even better, but even as it is it works so well. 

I'm amazed that it continues to function on newer and newer iPhones when it hasn't been updated in so long, and I'm dreading the day it can't keep up.

### 5/5 — I love this app - sad it doesn’t seem to be actively developed

*2022-01-04, version 1.1.3*

I’ve loved this app for years and years.  It is simple and intuitive and rewarding.  Just five minutes calms me down. 15 minutes feels like a mini-vacation.

### 5/5 — Love this app!

*2020-08-04, version 1.1.3*

This app is amazing. It gives numerous types of biofeedback based on your breathing. It really encourages calm in a world filled with chaos. I encourage anyone who wants some calm and meditation in their life to get and use this daily.

### 5/5 — Rediscovered

*2019-12-10, version 1.1.3*

Very interesting app. Was looks for apps to delete on my phone and I rediscovered this.  Glad I did. Does more than my fitbit.

## Frequently asked questions about BellyBio Interactive Breathing

### What is BellyBio Interactive Breathing?

BellyBio is an app that uses your iPhone's sensors to measure deep abdominal breathing. It synchronizes beautiful music and light patterns with your breath, providing a rewarding and engaging biofeedback experience. The app aims to make deep breathing more pleasant and to offer an objective measure of your stress levels based on your breathing patterns.

### How does BellyBio work?

You place your iPhone on your stomach, face up, so it tilts with your belly's movement during deep abdominal breaths. The app measures the angle change to detect your breathing. This data is then used to generate synchronized music and light, and to display real-time breathing and stress curves.

### What are the key features of BellyBio?

Key features include interactive musical themes that play in sync with your breathing, audio feedback on stress levels, customizable breathing colors, real-time graphs of breathing and stress, and logs of your sessions. It also features a 3D animation showing global user activity.

### Who is BellyBio for?

This app is specifically for individuals who can naturally breathe deeply and slowly from their belly. It is not recommended for those who struggle with abdominal breathing, as it requires this fundamental skill to function effectively and avoid frustration.

### Is BellyBio free to download and use?

The app is free to download, but it offers in-app purchases. The description mentions a large file size due to a multiformat music base, suggesting that additional content or features may be available for purchase.

## Version history (last 5 releases)

### 1.1.3 — 2015-11-04

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

Fix purchase restoration

### 1.1.2 — 2015-08-04

Bug fixes (music playing with breathing)

### 1.1.1 — 2015-07-06

Bug fixes

### 1.1 — 2015-04-30

Update for iOS 8

### 1.0 — 2010-02-20

No release notes.

## Apps similar to BellyBio Interactive Breathing

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Breathe2Relax](https://appshunter.io/ios/app/breathe2relax/id425720246) | 4.3 (313) | Free | Health & Fitness |
| [Paced Breathing](https://appshunter.io/ios/app/paced-breathing/id6447217781) | 4.7 (41) | Free | Health & Fitness |
| [Breathing Exercises: Breathe+](https://appshunter.io/ios/app/breathing-exercises-breathe-plus/id1106998959) | 4.7 (3,380) | Free | Health & Fitness |
| [Awesome Breathing: Pacer Timer](https://appshunter.io/ios/app/awesome-breathing-pacer-timer/id1453087953) | 4.9 (1,164) | Free | Health & Fitness |
| [Optimal HRV](https://appshunter.io/ios/app/optimal-hrv/id1501292206) | 3.1 (23) | Free | Health & Fitness |
| [HeartRate+ Coherence PRO](https://appshunter.io/ios/app/heartrate-plus-coherence-pro/id763865838) | 4.1 (117) | Free | Health & Fitness |

## More apps by RelaxLine

- [Lull - Waves of Calm](https://appshunter.io/ios/app/lull-waves-of-calm/id1087279496)
- [Breathion - Breath Reactor](https://appshunter.io/ios/app/breathion-breath-reactor/id6740405677)

All apps by RelaxLine: https://appshunter.io/developer/352027981

## Related topics

[belly bio](https://appshunter.io/ios/topics/belly-bio) · [biofeedback breathing](https://appshunter.io/ios/topics/biofeedback-breathing)

---

*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 2026-07-19.*