# HRVSpark

> Raw Heart Rate Variability data visualized as a complication on Apple Watch. (iPhone/iPad app by Joel Farthing.)

- Source: https://appshunter.io/ios/app/hrvspark/id6759590346 (this page in markdown: same URL + `.md`)
- Developer: [Joel Farthing](https://appshunter.io/developer/1879704683)
- Category: Health & Fitness
- Price: Free with in-app purchases
- Rating: 5.00/5 from 2 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 17.0 · 3 MB
- Languages: American English
- Released: 2026-03-10
- Data updated: 2026-07-07
- Monetization: freemium
- User reviews in markdown: https://appshunter.io/ios/app/hrvspark/id6759590346/reviews.md

## What is HRVSpark?

HRVSpark puts your raw Heart Rate Variability data directly on your Apple Watch face as a beautiful, glowing sparkline complication.

WHAT YOU GET
• Free 8-hour raw HRV sparkline complication with your latest SDNN reading
• Pro 24-hour, 7-day, and 30-day complication views for broader context
• Circular gauge and corner complications built for glanceable watch-face use
• Clean iPhone companion app with live gallery, install guidance, and detail views

WHY RAW?
Most HRV apps bury your data behind opaque "readiness scores" and color-coded stress labels. HRVSpark skips the interpretation layer entirely. You see the actual numbers — and over time, you build your own intuition about what your data means.

BUILT FOR YOUR WRIST
HRVSpark is complication-first. It was designed from day one to live on your watch face, not behind an app icon. Glance at your wrist and immediately see your trend.

PAIR IT WITH RHRSpark
Our sister app RHRSpark brings the same no-scores, no-verdicts philosophy to resting heart rate, giving you a complementary baseline view alongside HRVSpark.

SIMPLE, HONEST PRICING
Free to try with a one-time Pro unlock. No subscriptions. No tracking. No ads. Ever.

## Key features

- 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

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

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


## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/hrvspark/id6759590346/reviews.md

### 5/5 — Finally!  An HRV app that just gives me the data..

*2026-03-11*

Love this HRV app that doesn't try to give me a meaningless "stress score" and charge me $10 a month subscription for it.

**Developer response:** Thank you! This is exactly why I built HRVSpark. Glad the raw data, ad-free, subscription-free approach resonates with you. If you ever have feedback or feature requests, I'm always listening at: info@filamentlabs.io.

## Frequently asked questions about HRVSpark

### What is HRVSpark?

HRVSpark displays your raw Heart Rate Variability data as a complication on your Apple Watch face. It offers a free 8-hour view and a Pro version for longer-term data analysis, focusing on presenting your actual numbers without interpretation.

### How much does HRVSpark cost?

HRVSpark is free to try with a one-time Pro unlock for extended features. There are no subscriptions or recurring charges. The app is also ad-free and does not track user data.

### Does HRVSpark have ads?

No, HRVSpark is completely ad-free. The developer explicitly states 'No ads. Ever.' This ensures an uninterrupted user experience focused on your health data.

### What devices does HRVSpark support?

HRVSpark is designed to work with Apple Watch, iPhone, and iPad. The primary functionality is on the Apple Watch face, with a companion app for iPhone and iPad.

### How often is HRVSpark updated?

The latest version of HRVSpark is 1.0.6, last updated on May 13, 2026. This indicates a relatively recent update, suggesting ongoing development and support for the application.

### What is the age rating for HRVSpark?

HRVSpark has an age rating of 4+. This means it is suitable for users of all ages, with no mature content or themes present in the application.

### How does HRVSpark differ from other HRV apps?

Unlike many HRV apps that provide 'readiness scores' or 'stress labels', HRVSpark shows your raw data directly. This allows users to build their own understanding of what their HRV numbers mean over time.

### Can I see my HRV trend over a longer period with HRVSpark?

Yes, while the free version offers an 8-hour view, the Pro version of HRVSpark provides complication views for 24 hours, 7 days, and 30 days, allowing for broader trend analysis.

## Version history (last 5 releases)

### 1.0.6 — 2026-05-13

Adds support for showing current Pro unlock promotions in the iPhone app and Apple Watch app when a campaign is active.

### 1.0.5 — 2026-05-05

Improves performance and battery use in the watch app and complications. HRVSpark now avoids duplicate refresh work, limits fast complication retries when 30-day data is still catching up, and keeps iPhone/watch sync status visible after relaunch. Also clarifies sync labels and moves the app version to the bottom of About.

### 1.0.4 — 2026-05-04

Improves Pro unlock sync between iPhone and Apple Watch and refreshes App Store metadata URLs.

### 1.0.3 — 2026-04-25

Adds a live RHRSpark sister-app link near the top of About.

### 1.0.2 — 2026-04-22

Embedded live title branding, cleaner Gallery/Watch/About organization, mirrored RHRSpark cross-promotion, and improved watch install guidance.

## More apps by Joel Farthing

- [RHRSpark](https://appshunter.io/ios/app/rhrspark/id6762872980)

All apps by Joel Farthing: https://appshunter.io/developer/1879704683

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-07.*