# ErgSpeed Rowing Logbook vs Zeliox ZCM6

The clearest difference is in-app purchases: Zeliox ZCM6 at none against ErgSpeed Rowing Logbook's 3. Zeliox ZCM6 also leads on iOS requirement (13.0 vs 26.0). ErgSpeed Rowing Logbook's advantage is update cadence (every 9 days vs every 3 months). On price, ads and device support there is nothing between them.

Both are free to download. ErgSpeed Rowing Logbook sells 3 in-app purchases, starting at $5.99 per month. Zeliox ZCM6 asks for nothing beyond the download.

ErgSpeed Rowing Logbook ships an update every 9 days, Zeliox ZCM6 every 3 months. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | ErgSpeed Rowing Logbook | Zeliox ZCM6 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 9 days** | Every 3 months |
| Monetization | Freemium | — |
| Size | 4 MB | 24 MB |
| Requires iOS | 26.0 | **13.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | +4 | 4+ |
| Developer | [Sports Stats Limited](https://appshunter.io/developer/1481193925) | [Zeliox](https://appshunter.io/developer/1478320738) |

## What reviewers say

### ErgSpeed Rowing Logbook

[App page](https://appshunter.io/ios/app/ergspeed-rowing-logbook/id6447811175)

Log and analyze indoor rowing workouts with detailed metrics, powerful calculators, and visual progress tracking. Features include AI-powered data scanning, performance charts, and race planning tools to help you train smarter and achieve your goals.

**Highlights:** Log rowing workouts with detailed metrics, Calculate target splits for any distance/time, AI-powered data scanning from monitors, Performance charts and activity heatmap, Year in Pixels training visualization, Power profile analysis, Race planner with segment splits

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $5.99 | per month |
| Yearly Subscription | $29.99 | per year |
| Lifetime Access | $59.99 | one-time |


### Zeliox ZCM6

[App page](https://appshunter.io/ios/app/zeliox-zcm6/id6740893714)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ErgSpeed Rowing Logbook free?

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

### Is Zeliox ZCM6 free?

Zeliox ZCM6 is free to download, with no in-app purchases.

### Do ErgSpeed Rowing Logbook or Zeliox ZCM6 have ads?

Neither ErgSpeed Rowing Logbook nor Zeliox ZCM6 shows ads.

### Which is updated more often, ErgSpeed Rowing Logbook or Zeliox ZCM6?

ErgSpeed Rowing Logbook ships an update every 9 days, and Zeliox ZCM6 every 3 months. Most recently, ErgSpeed Rowing Logbook was updated on October 24, 2026 and Zeliox ZCM6 on October 25, 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.*