# HRV4Training vs Laktic Pace Calculator

The clearest difference is price: Laktic Pace Calculator at Free against HRV4Training's $9.99. Laktic Pace Calculator also leads on rating (5.0 vs 3.6) and update cadence (every 9 days vs every 6 weeks). HRV4Training's advantage is ratings volume (288 vs 2) and chart position (#25 vs unranked). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Laktic Pace Calculator is free to download; HRV4Training costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Laktic Pace Calculator holds the better App Store score, 5.0 against 3.6. That said, the two scores are not equally well evidenced: HRV4Training has 288 ratings behind it against 2, so its average is the more settled of the two.

HRV4Training ships an update every 6 weeks, Laktic Pace Calculator every 9 days. The most recent releases landed on October 18, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | HRV4Training | Laktic Pace Calculator |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | [3.6 (288 ratings)](https://appshunter.io/ios/app/hrv4training/id686923970/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/laktic-pace-calculator/id6808660864/reviews)** |
| Number of ratings | **288** | 2 |
| Positive reviews | 61.2% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 9 days** |
| Monetization | Paid | **Free** |
| Best chart rank | **#25** | — |
| Size | 35 MB | 28 MB |
| Requires iOS | 15.6 | **15.1** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [A.S.M.A. B.V.](https://appshunter.io/developer/1066843463) | [Travis Mahoney](https://appshunter.io/developer/1896344290) |

## What reviewers say

### HRV4Training

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

**Currently charting:** #25 Top Paid · Health & Fitness (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


### Laktic Pace Calculator

[App page](https://appshunter.io/ios/app/laktic-pace-calculator/id6808660864)

Calculate heat-adjusted running paces for training and racing. Input your personal records and current weather conditions to receive adjusted threshold zones and per-mile ranges. Coaches can manage athlete rosters and share workout boards.

**Highlights:** Heat-adjusted threshold paces, Race PR and track/road pace calculation, Temperature and dew point adjustment, Rep length scaling for heat penalty, Athlete roster management for coaches, Workout board sharing, Session logging and performance comparison

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is HRV4Training free?

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

### Is Laktic Pace Calculator free?

Laktic Pace Calculator is free to download, with no in-app purchases.

### Which has better reviews, HRV4Training or Laktic Pace Calculator?

Laktic Pace Calculator is rated higher. HRV4Training averages 3.6 out of 5 from 288 ratings, while Laktic Pace Calculator averages 5.0 from 2 ratings.

### Do HRV4Training or Laktic Pace Calculator have ads?

Neither HRV4Training nor Laktic Pace Calculator shows ads.

### Which is updated more often, HRV4Training or Laktic Pace Calculator?

HRV4Training ships an update every 6 weeks, and Laktic Pace Calculator every 9 days. Most recently, HRV4Training was updated on October 18, 2026 and Laktic Pace Calculator on October 11, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*