# Yudemon HRV vs QUS Tech

The clearest difference is in-app purchases: QUS Tech at none against Yudemon HRV's 4. Yudemon HRV's advantage is update cadence (every 2 days vs every 3 months) and iOS requirement (15.0 vs 17.0). On price, ads and device support there is nothing between them.

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

Yudemon HRV ships an update every 2 days, QUS Tech every 3 months. The most recent releases landed on September 22, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | Yudemon HRV | QUS Tech |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (12 ratings)](https://appshunter.io/ios/app/yudemon-hrv/id1629852639/reviews)** | — |
| Number of ratings | **12** | — |
| Positive reviews | 90.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 3 months |
| Monetization | Free with in-app purchases | — |
| Size | 169 MB | 58 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Yudemon LLC](https://appshunter.io/developer/1629852641) | [sanSirro GmbH](https://appshunter.io/developer/1462270226) |

## What reviewers say

### 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 |


### QUS Tech

[App page](https://appshunter.io/ios/app/qus-tech/id6745941500)

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

**In-app purchases:** none


## Frequently asked questions

### Is Yudemon HRV free?

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

### Is QUS Tech free?

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

### Do Yudemon HRV or QUS Tech have ads?

Neither Yudemon HRV nor QUS Tech shows ads.

### Which is updated more often, Yudemon HRV or QUS Tech?

Yudemon HRV ships an update every 2 days, and QUS Tech every 3 months. Most recently, Yudemon HRV was updated on September 22, 2026 and QUS Tech on September 9, 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.*