# HRV4Training vs Williams Pace...

The clearest difference is rating: Williams Pace... at 4.5 against HRV4Training's 3.6. Williams Pace... also leads on review sentiment (88% vs 61%) and price ($4.99 vs $9.99). HRV4Training's advantage is ratings volume (288 vs 17) and chart position (#7 vs #198). On update cadence, ads, in-app purchases and monetization model there is nothing between them.

HRV4Training costs $9.99 and Williams Pace... $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Williams Pace... holds the better App Store score, 4.5 against 3.6. That said, the two scores are not equally well evidenced: HRV4Training has 288 ratings behind it against 17, so its average is the more settled of the two. Written reviews point the same way: 61% of HRV4Training's written reviews are positive against 88% of Williams Pace...'s.

HRV4Training ships an update every 6 weeks, Williams Pace... monthly. The most recent releases landed on September 24, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | HRV4Training | Williams Pace... |
| --- | --- | --- |
| Price | $9.99 | **$4.99** |
| Rating | [3.6 (288 ratings)](https://appshunter.io/ios/app/hrv4training/id686923970/reviews) | **[4.5 (17 ratings)](https://appshunter.io/ios/app/williams-pace/id1457530273/reviews)** |
| Number of ratings | **288** | 17 |
| Positive reviews | 61.2% of reviews | **87.5% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Monthly** |
| Monetization | Paid | Paid |
| Best chart rank | **#7** | #198 |
| Size | 35 MB | 1 MB |
| Requires iOS | 15.6 | **14.5** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [A.S.M.A. B.V.](https://appshunter.io/developer/1066843463) | [Robert E Williams](https://appshunter.io/developer/1457530272) |

## What reviewers say

### HRV4Training

[App page](https://appshunter.io/ios/app/hrv4training/id686923970)

**Currently charting:** #7 Top Paid · Health & Fitness, #193 Top Paid (US App Store)

Quantify stress, balance training and lifestyle, and improve performance with scientifically validated heart rate variability insights. This app accurately assesses HRV using your phone's camera or compatible devices, offering actionable interpretations for optimizing your training plan.

**Highlights:** HRV-based stress quantification, Training and lifestyle balance, Performance improvement insights, Camera-based HRV assessment, Integration with wearables, Training load analysis, VO2max and Lactate Threshold estimation

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Accurate HRV measurements
- 🚀 Straightforward and easy to use
- 💡 Provides valuable insights for training and recovery
- 👍 Integrates well with other fitness apps
- 👍 Responsive and helpful developer support

**What reviewers complain about**

- 🐛 Inconsistent readings and technical issues
- 🔒 Requires user account and data sharing
- 🔒 Concerns about data privacy
- 🔋 Drains battery when using camera for measurements

**Reported bugs**

- App crashes frequently, especially with iOS updates
- Syncing issues with Strava, TrainingPeaks, and Apple Health
- Camera-based measurements often unreliable or inconsistent

**Requested features**

- Allow multiple measurements per day
- Improve integration with Apple Watch and other wearables
- Add more customization options and data visualization
- Expand support for non-athletic use cases


### Williams Pace...

[App page](https://appshunter.io/ios/app/williams-pace/id1457530273)

**Currently charting:** #198 Top Paid · Health & Fitness (US App Store)

This app calculates running paces using methods developed by a legendary coach. It helps runners of all levels train effectively for road and track events, drawing on decades of proven performance-enhancing techniques.

**Highlights:** Pace calculation for road and track, Based on legendary coach's methods, Training for world-class runners, Developed by a Bowerman protégé, Helps break performance barriers

**In-app purchases:** none


## Frequently asked questions

### Is HRV4Training free?

HRV4Training costs $9.99, with no in-app purchases.

### Is Williams Pace... free?

Williams Pace... costs $4.99, with no in-app purchases.

### Which has better reviews, HRV4Training or Williams Pace...?

Williams Pace... is rated higher. HRV4Training averages 3.6 out of 5 from 288 ratings, while Williams Pace... averages 4.5 from 17 ratings.

### Do HRV4Training or Williams Pace... have ads?

Neither HRV4Training nor Williams Pace... shows ads.

### Which is updated more often, HRV4Training or Williams Pace...?

HRV4Training ships an update every 6 weeks, and Williams Pace... monthly. Most recently, HRV4Training was updated on September 24, 2026 and Williams Pace... on September 10, 2026.

### Which is more popular, HRV4Training or Williams Pace...?

HRV4Training currently peaks at #7 in the App Store charts, and Williams Pace... at #198. Chart position reflects recent download velocity rather than total install base.

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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.*