# CNS Tap Test vs HRV4Training

The clearest difference is rating: CNS Tap Test at 4.6 against HRV4Training's 3.6. CNS Tap Test also leads on price ($1.99 vs $9.99). HRV4Training's advantage is update cadence (every 6 weeks vs every 3 months). On review sentiment, ratings volume, ads and in-app purchases there is nothing between them.

CNS Tap Test costs $1.99 and HRV4Training $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

CNS Tap Test holds the better App Store score, 4.6 against 3.6. Both are backed by a comparable volume of ratings — 277 and 288 respectively. Written reviews point the same way: 69% of CNS Tap Test's written reviews are positive against 61% of HRV4Training's.

CNS Tap Test ships an update every 3 months, HRV4Training every 6 weeks. The most recent releases landed on October 16, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | CNS Tap Test | HRV4Training |
| --- | --- | --- |
| Price | **$1.99** | $9.99 |
| Rating | **[4.6 (277 ratings)](https://appshunter.io/ios/app/cns-tap-test/id495396849/reviews)** | [3.6 (288 ratings)](https://appshunter.io/ios/app/hrv4training/id686923970/reviews) |
| Number of ratings | 277 | **288** |
| Positive reviews | **68.8% of reviews** | 61.2% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 6 weeks** |
| Monetization | **Free** | Paid |
| Best chart rank | #70 | **#33** |
| Size | 4 MB | 35 MB |
| Requires iOS | 16.0 | **15.6** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [smudge.io PTY LTD](https://appshunter.io/developer/426335181) | [A.S.M.A. B.V.](https://appshunter.io/developer/1066843463) |

## What reviewers say

### CNS Tap Test

[App page](https://appshunter.io/ios/app/cns-tap-test/id495396849)

**Currently charting:** #70 Top Paid · Health & Fitness (US App Store)

This app measures central nervous system (CNS) status using a finger tapping test. Track your performance over time to identify optimal training days or potential fatigue, sickness, or injury.

**Highlights:** Measures central nervous system status, Tracks finger tapping speed, Establishes baseline performance, Identifies CNS fatigue, Graphs and saves test results, Allows for multiple daily samples

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Simple and direct to use
- 👍 Easy to use
- 👍 Great app for monitoring recovery
- 👍 Effective CNS testing tool
- 👍 Useful for assessing neural fatigue

**What reviewers complain about**

- 😞 Confusing interface
- 😞 Plain and not very useful
- 😞 No real information provided
- 😞 Not worth buying
- 😞 Data export issues

**Reported bugs**

- Cannot port data when switching iPhones

**Requested features**

- Add time of day to graphs
- Set parameters on graph
- Integrate data from sleep/step trackers
- Sync with calendar
- Option for 'best out of 3'


### HRV4Training

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

**Currently charting:** #33 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


## Frequently asked questions

### Is CNS Tap Test free?

CNS Tap Test costs $1.99, with no in-app purchases.

### Is HRV4Training free?

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

### Which has better reviews, CNS Tap Test or HRV4Training?

CNS Tap Test is rated higher. CNS Tap Test averages 4.6 out of 5 from 277 ratings, while HRV4Training averages 3.6 from 288 ratings.

### Do CNS Tap Test or HRV4Training have ads?

Neither CNS Tap Test nor HRV4Training shows ads.

### Which is updated more often, CNS Tap Test or HRV4Training?

CNS Tap Test ships an update every 3 months, and HRV4Training every 6 weeks. Most recently, CNS Tap Test was updated on October 16, 2026 and HRV4Training on October 17, 2026.

### Which is more popular, CNS Tap Test or HRV4Training?

CNS Tap Test currently peaks at #70 in the App Store charts, and HRV4Training at #33. 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.*