# HRV4Biofeedback vs Surreally

The clearest difference is price: Surreally at Free against HRV4Biofeedback's $9.99. HRV4Biofeedback's advantage is in-app purchases (none vs 3) and update cadence (every 2 months vs every 5 months). On ads and device support there is nothing between them.

Surreally is free to download; HRV4Biofeedback costs $9.99 up front. Surreally sells 3 in-app purchases, starting at $99.00 per month. HRV4Biofeedback asks for nothing beyond the download.

HRV4Biofeedback ships an update every 2 months, Surreally every 5 months. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | HRV4Biofeedback | Surreally |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | **[3.4 (30 ratings)](https://appshunter.io/ios/app/hrv4biofeedback/id1504638613/reviews)** | — |
| Number of ratings | **30** | — |
| Positive reviews | 53.1% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 5 months |
| Monetization | Free | — |
| Size | 138 MB | 31 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [A.S.M.A. B.V.](https://appshunter.io/developer/1066843463) | [Surreal Digital Academy](https://appshunter.io/developer/1766344058) |

## What reviewers say

### HRV4Biofeedback

[App page](https://appshunter.io/ios/app/hrv4biofeedback/id1504638613)

This app uses your phone's camera to measure heart rate variability and provide biofeedback. It guides you through deep breathing exercises to improve self-regulation and manage stress. Track your progress and explore correlations with your daily experiences.

**Highlights:** Camera-based HRV measurement, Real-time heart rate feedback, Resonant frequency analysis, Biofeedback score, Subjective annotations, HealthKit integration, Bluetooth sensor support

**Features:** Vision Pro support

**In-app purchases:** none


### Surreally

[App page](https://appshunter.io/ios/app/surreally/id6761781953)

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly membership | $99.00 | per month |
| Quarterly membership | $299.99 | per 3 months |
| Yearly membership | $899.00 | per year |


## Frequently asked questions

### Is HRV4Biofeedback free?

HRV4Biofeedback costs $9.99, with no in-app purchases.

### Is Surreally free?

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

### Do HRV4Biofeedback or Surreally have ads?

Neither HRV4Biofeedback nor Surreally shows ads.

### Which is updated more often, HRV4Biofeedback or Surreally?

HRV4Biofeedback ships an update every 2 months, and Surreally every 5 months. Most recently, HRV4Biofeedback was updated on November 3, 2026 and Surreally on October 31, 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.*