# HRVSpark vs OpenHealth

The clearest difference is in-app purchases: OpenHealth at none against HRVSpark's 2. OpenHealth also leads on update cadence (every 2 days vs weekly). HRVSpark's advantage is device support (3 vs 1) and iOS requirement (17.0 vs 26.0). On price and ads there is nothing between them.

Both are free to download. HRVSpark sells 2 one-off in-app purchases. OpenHealth asks for nothing beyond the download.

HRVSpark ships an update weekly, OpenHealth every 2 days. The most recent releases landed on October 14, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | HRVSpark | OpenHealth |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/hrvspark/id6759590346/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Weekly | **Every 2 days** |
| Monetization | Freemium | — |
| Size | 6 MB | 3 MB |
| Requires iOS | **17.0** | 26.0 |
| Devices | **iPhone, iPad, Apple Watch** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [Joel Farthing](https://appshunter.io/developer/1879704683) | [Sihang Chen](https://appshunter.io/developer/1479493730) |

## What reviewers say

### HRVSpark

[App page](https://appshunter.io/ios/app/hrvspark/id6759590346)

Visualize your raw heart rate variability data directly on your Apple Watch face with a dynamic sparkline complication. Get immediate insights into your body's trends without opaque scores or labels. A companion iPhone app provides detailed views and guidance.

**Highlights:** Raw HRV sparkline complication, 8-hour free complication, 24/7, 7-day, 30-day Pro views, Circular gauge and corner complications, iPhone companion app, No interpretation layer, Complication-first design

**Features:** Apple Watch app

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| HRVSpark Pro | $0.99 | one-time |
| HRVSpark Tip Jar | $4.99 | one-time |


### OpenHealth

[App page](https://appshunter.io/ios/app/openhealth-self-help-loops/id6811626331)

**In-app purchases:** none


## Frequently asked questions

### Is HRVSpark free?

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

### Is OpenHealth free?

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

### Do HRVSpark or OpenHealth have ads?

Neither HRVSpark nor OpenHealth shows ads.

### Which is updated more often, HRVSpark or OpenHealth?

HRVSpark ships an update weekly, and OpenHealth every 2 days. Most recently, HRVSpark was updated on October 14, 2026 and OpenHealth 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.*