# HRV Resonant Coherence vs KAF App

The clearest difference is in-app purchases: KAF App at none against HRV Resonant Coherence's 3. KAF App also leads on iOS requirement (13.0 vs 26.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. HRV Resonant Coherence sells 3 in-app purchases, starting at $1.99 per month. KAF App asks for nothing beyond the download.

HRV Resonant Coherence ships an update every 5 weeks, KAF App monthly. The most recent releases landed on October 1, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | HRV Resonant Coherence | KAF App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (11 ratings)](https://appshunter.io/ios/app/hrv-resonant-coherence-pace/id6502601669/reviews)** | — |
| Number of ratings | **11** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Monthly** |
| Monetization | Subscription | — |
| Size | 156 MB | 40 MB |
| Requires iOS | 26.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Christoph Stadelbauer](https://appshunter.io/developer/1746084312) | [Genevieve Ama Kyeremaa Finjap](https://appshunter.io/developer/1774727517) |

## What reviewers say

### HRV Resonant Coherence

[App page](https://appshunter.io/ios/app/hrv-resonant-coherence-pace/id6502601669)

This app offers guided coherent breathing exercises to help you manage stress and improve focus. It provides visual, audio, and haptic feedback with customizable options for a personalized experience. Enjoy offline usability and a distraction-free interface.

**Highlights:** Guided coherent breathing, Visual, audio & haptic guidance, Customization options, Distraction-free design, Offline usability

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pace Premium | $1.99 | per month |
| Pace Premium | $9.99 | per year |
| Pace Premium Lifetime | $24.99 | one-time |


### KAF App

[App page](https://appshunter.io/ios/app/kaf-app/id6503299015)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is HRV Resonant Coherence free?

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

### Is KAF App free?

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

### Do HRV Resonant Coherence or KAF App have ads?

Neither HRV Resonant Coherence nor KAF App shows ads.

### Which is updated more often, HRV Resonant Coherence or KAF App?

HRV Resonant Coherence ships an update every 5 weeks, and KAF App monthly. Most recently, HRV Resonant Coherence was updated on October 1, 2026 and KAF App on October 12, 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.*