# Heart Rate Variability + vs Simple Stress Watch

The clearest difference is in-app purchases: Simple Stress Watch at none against Heart Rate Variability +'s 5. Simple Stress Watch also leads on update cadence (weekly vs every 4 months). Heart Rate Variability +'s advantage is iOS requirement (16.0 vs 26.0). On price, ads and device support there is nothing between them.

Both are free to download. Heart Rate Variability + sells 5 in-app purchases, starting at $4.99 per 7 days. Simple Stress Watch asks for nothing beyond the download.

Heart Rate Variability + ships an update every 4 months, Simple Stress Watch weekly. The most recent releases landed on October 25, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Heart Rate Variability + | Simple Stress Watch |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.6 (8 ratings)](https://appshunter.io/ios/app/simple-stress-watch/id6770392749/reviews)** |
| Number of ratings | — | **8** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 months | **Weekly** |
| Monetization | — | Free |
| Size | 54 MB | 8 MB |
| Requires iOS | **16.0** | 26.0 |
| Devices | iPhone, iPad | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [MD SOFTWARE SERVICES LTD](https://appshunter.io/developer/1843392499) | [Ganotis Holdings, Inc.](https://appshunter.io/developer/939480375) |

## What reviewers say

### Heart Rate Variability +

[App page](https://appshunter.io/ios/app/heart-rate-variability-plus/id6753306246)

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $4.99 | per 7 days |
| Weekly-Trial | $4.99 | per 7 days |
| Monthly | $12.99 | per month |
| Yearly | $39.99 | per year |
| Lifetime | $59.99 | one-time |


### Simple Stress Watch

[App page](https://appshunter.io/ios/app/simple-stress-watch/id6770392749)

This app displays your heart rate variability as a simple recovery meter on your Apple Watch face. It uses data from Apple Health to show your recovery status with a colored zone, offering a quick, at-a-glance understanding of your well-being. Your personal data remains on your device for privacy.

**Highlights:** Heart rate variability recovery meter, Apple Watch face complications, Reads data from Apple Health, Personalized rolling baseline comparison, Colored recovery zones, Minimalist and simple design, On-device data storage

**Features:** Apple Watch app

**In-app purchases:** none


## Frequently asked questions

### Is Heart Rate Variability + free?

Heart Rate Variability + is free to download, with in-app purchases available.

### Is Simple Stress Watch free?

Simple Stress Watch is free to download, with no in-app purchases.

### Do Heart Rate Variability + or Simple Stress Watch have ads?

Neither Heart Rate Variability + nor Simple Stress Watch shows ads.

### Which is updated more often, Heart Rate Variability + or Simple Stress Watch?

Heart Rate Variability + ships an update every 4 months, and Simple Stress Watch weekly. Most recently, Heart Rate Variability + was updated on October 25, 2026 and Simple Stress Watch on November 5, 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.*