# Callibri Biofeedback vs Yudemon HRV

The clearest difference is rating: Yudemon HRV at 4.5 against Callibri Biofeedback's 3.0. Yudemon HRV also leads on update cadence (every 2 days vs every 4 months) and ratings volume (13 vs 1). Callibri Biofeedback's advantage is in-app purchases (none vs 4). On price, ads and iOS requirement there is nothing between them.

Both are free to download. Yudemon HRV sells 4 in-app purchases, starting at $2.99 per month. Callibri Biofeedback asks for nothing beyond the download.

Yudemon HRV holds the better App Store score, 4.5 against 3.0. That said, the two scores are not equally well evidenced: Yudemon HRV has 13 ratings behind it against 1, so its average is the more settled of the two.

Callibri Biofeedback ships an update every 4 months, Yudemon HRV every 2 days. Both last shipped on November 3, 2026.

## The numbers

| Metric | Callibri Biofeedback | Yudemon HRV |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (1 ratings)](https://appshunter.io/ios/app/callibri-biofeedback/id1517798639/reviews) | **[4.5 (13 ratings)](https://appshunter.io/ios/app/yudemon-hrv/id1629852639/reviews)** |
| Number of ratings | 1 | **13** |
| Positive reviews | — | 91.7% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 269 MB | 175 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 12+ | 4+ |
| Developer | [BRAINBIT INC.](https://appshunter.io/developer/1510548622) | [Yudemon LLC](https://appshunter.io/developer/1629852641) |

## What reviewers say

### Callibri Biofeedback

[App page](https://appshunter.io/ios/app/callibri-biofeedback/id1517798639)

This system uses a sensor to measure muscle tone and visualizes your muscle activity in a game-like interface. It's designed for self-regulation training to improve muscle strength and bodily functions.

**Highlights:** Muscle tone evaluation (EMG signal), Visualizes muscle activity in games, Muscle restoration for stroke/CP, Home fitness muscle strengthening, Increases physiological reserves

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Yudemon HRV

[App page](https://appshunter.io/ios/app/yudemon-hrv/id1629852639)

Enhance stress resilience and self-regulation with this visual and sonic tool for resonance breathing and HRV biofeedback. Connect a heart rate monitor for advanced analytics and personalized training journeys. Enjoy dynamic visuals and custom soundscapes designed to optimize your practice.

**Highlights:** Resonance breathing timer, HRV biofeedback training, ECG heart rate monitor integration, Journey Mode for optimal breathing rate, Customizable visuals and soundscapes, Heartwork generative art based on data

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Yudemon Pro (Monthly) | $2.99 | per month |
| Yudemon Pro (Monthly) | $4.99 | per month |
| Yudemon Pro (Yearly) | $19.99 | per year |
| Yudemon Pro (Yearly) | $29.99 | per year |


## Frequently asked questions

### Is Callibri Biofeedback free?

Callibri Biofeedback is free to download, with no in-app purchases.

### Is Yudemon HRV free?

Yudemon HRV is free to download, with in-app purchases available.

### Which has better reviews, Callibri Biofeedback or Yudemon HRV?

Yudemon HRV is rated higher. Callibri Biofeedback averages 3.0 out of 5 from 1 ratings, while Yudemon HRV averages 4.5 from 13 ratings.

### Do Callibri Biofeedback or Yudemon HRV have ads?

Neither Callibri Biofeedback nor Yudemon HRV shows ads.

### Which is updated more often, Callibri Biofeedback or Yudemon HRV?

Callibri Biofeedback ships an update every 4 months, and Yudemon HRV every 2 days. Most recently, Callibri Biofeedback was updated on November 3, 2026 and Yudemon HRV on November 3, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*