# Optimal HRV vs CapnoTrainer

The clearest difference is in-app purchases: CapnoTrainer at none against Optimal HRV's 3. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Optimal HRV sells 3 in-app purchases, starting at $9.99 per month. CapnoTrainer asks for nothing beyond the download.

Optimal HRV ships an update fortnightly, CapnoTrainer every 3 weeks. The most recent releases landed on September 21, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | Optimal HRV | CapnoTrainer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (24 ratings)](https://appshunter.io/ios/app/optimal-hrv-biofeedback/id1501292206/reviews)** | — |
| Number of ratings | **24** | — |
| Positive reviews | 16.7% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 3 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 52 MB | 54 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Optimal, LLC](https://appshunter.io/developer/1501292205) | [Muhammad Arshad Khan](https://appshunter.io/developer/1617354083) |

## What reviewers say

### Optimal HRV

[App page](https://appshunter.io/ios/app/optimal-hrv-biofeedback/id1501292206)

Monitor, analyze, and improve your Heart Rate Variability (HRV) scores. This app offers personalized training, biofeedback, and stress-reducing activities to enhance health, reduce stress, and improve mental clarity.

**Highlights:** Real-time HRV monitoring, Personalized training plans, Guided meditation and breathing exercises, Comprehensive data analysis, Stress response insights, Biofeedback optimization

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 month | $9.99 | per month |
| 6 Month | $47.99 | per 6 months |
| One Year | $59.99 | per year |


### CapnoTrainer

[App page](https://appshunter.io/ios/app/capnotrainer/id1617354081)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Optimal HRV free?

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

### Is CapnoTrainer free?

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

### Do Optimal HRV or CapnoTrainer have ads?

Neither Optimal HRV nor CapnoTrainer shows ads.

### Which is updated more often, Optimal HRV or CapnoTrainer?

Optimal HRV ships an update fortnightly, and CapnoTrainer every 3 weeks. Most recently, Optimal HRV was updated on September 21, 2026 and CapnoTrainer on September 10, 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.*