# NK Logbook vs ErgZone

The clearest difference is rating: ErgZone at 4.8 against NK Logbook's 3.8. ErgZone also leads on ratings volume (458 vs 12) and review sentiment (82% vs 63%). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. NK Logbook sells 4 in-app purchases, starting at $9.99 per month and ErgZone sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

ErgZone holds the better App Store score, 4.8 against 3.8. That said, the two scores are not equally well evidenced: ErgZone has 458 ratings behind it against 12, so its average is the more settled of the two. Written reviews point the same way: 63% of NK Logbook's written reviews are positive against 82% of ErgZone's.

NK Logbook ships an update every 4 months, ErgZone every 2 months. The most recent releases landed on October 9, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | NK Logbook | ErgZone |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.8 (12 ratings)](https://appshunter.io/ios/app/nk-logbook/id1392561808/reviews) | **[4.8 (458 ratings)](https://appshunter.io/ios/app/ergzone/id1474566270/reviews)** |
| Number of ratings | 12 | **458** |
| Positive reviews | 62.5% of reviews | **81.6% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 months** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 57 MB | 33 MB |
| Requires iOS | **13.0** | 13.4 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Nielsen-Kellerman Co.](https://appshunter.io/developer/698732840) | [ERGZONE LLC](https://appshunter.io/developer/455154242) |

## What reviewers say

### NK Logbook

[App page](https://appshunter.io/ios/app/nk-logbook/id1392561808)

This app pairs with compatible GPS devices to import, review, and analyze session data. It also streams live performance measurements for coaches and spectators, offering real-time insights into rowing performance and location.

**Highlights:** Import session data from compatible devices, Review and analyze boat metrics and stroke profile, Stream live performance measurements, Real-time location tracking for safety and spectator viewing, Team management for coaches and athletes, Compare live data from multiple boats

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Coach Subscription | $9.99 | per month |
| Monthly Team Subscription | $74.99 | per month |
| Annual Coach Subscription | $99.99 | per year |
| Team Yearly Subscription | $749.99 | per year |


### ErgZone

[App page](https://appshunter.io/ios/app/ergzone/id1474566270)

Optimize indoor training with real-time performance data, personalized pacing, and engaging challenges. Seamlessly integrates with various fitness machines, automating setup and providing critical metrics to enhance your workouts.

**Highlights:** Easy monitor setup, Live performance metrics, Smart interval pacing, Real-time workout alerts, Workout variety options, Performance history tracking, Community challenges

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| EZ+ Monthly | $4.99 | per month |
| EZ+ Annual | $49.99 | per year |

**What reviewers like**

- 👍 Easy workout programming
- 🚀 Seamless Concept2 integration
- 💡 Comprehensive metrics and data
- 👍 User-friendly interface
- ❤️ Responsive developers

**What reviewers complain about**

- 💰 Expensive subscription
- 🚫 No lifetime membership option
- ⚠️ Poor UI for logbook/rankings
- ❌ Incompatible with WaterRower
- ❓ Confusing group membership for premium features

**Reported bugs**

- Heart monitor sync issues with Samsung Galaxy watch
- Workouts not appearing in logbook when connected to ErgData
- Inaccurate total time in uploads
- Rest distance not included in Strava upload
- Group membership premium features unclear

**Requested features**

- Sync with Samsung Galaxy watch
- Add a beep function for interval changes
- Confirmation pop-up for unsaved workout changes
- Require unique names for workouts
- Apple Health integration


## Frequently asked questions

### Is NK Logbook free?

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

### Is ErgZone free?

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

### Which has better reviews, NK Logbook or ErgZone?

ErgZone is rated higher. NK Logbook averages 3.8 out of 5 from 12 ratings, while ErgZone averages 4.8 from 458 ratings.

### Do NK Logbook or ErgZone have ads?

Neither NK Logbook nor ErgZone shows ads.

### Which is updated more often, NK Logbook or ErgZone?

NK Logbook ships an update every 4 months, and ErgZone every 2 months. Most recently, NK Logbook was updated on October 9, 2026 and ErgZone on October 15, 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.*