# NeuroMetric vs HRVSpark

The clearest difference is in-app purchases: NeuroMetric at none against HRVSpark's 2. NeuroMetric also leads on iOS requirement (15.6 vs 17.0). On price, update cadence, ads and device support there is nothing between them.

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

Both ship on a similar rhythm, roughly weekly. The most recent releases landed on October 28, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | NeuroMetric | HRVSpark |
| --- | --- | --- |
| 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 | **No** | Yes |
| Ads | No | No |
| Update frequency | Weekly | Weekly |
| Monetization | — | Freemium |
| Size | 37 MB | 6 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | iPhone, iPod | **iPhone, iPad, Apple Watch** |
| Age rating | 12+ | 4+ |
| Developer | [ThatsMobile GmbH](https://appshunter.io/developer/521156353) | [Joel Farthing](https://appshunter.io/developer/1879704683) |

## What reviewers say

### NeuroMetric

[App page](https://appshunter.io/ios/app/neurometric/id6755871315)

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is NeuroMetric free?

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

### Is HRVSpark free?

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

### Do NeuroMetric or HRVSpark have ads?

Neither NeuroMetric nor HRVSpark shows ads.

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

NeuroMetric ships an update weekly, and HRVSpark weekly. Most recently, NeuroMetric was updated on October 28, 2026 and HRVSpark 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.*