# ErgSpeed Rowing Logbook vs IDfier

The clearest difference is update cadence: ErgSpeed Rowing Logbook at every 9 days against IDfier's monthly. IDfier's advantage is device support (3 vs 1) and iOS requirement (15.1 vs 26.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. ErgSpeed Rowing Logbook sells 3 in-app purchases, starting at $4.99 per month and IDfier sells 6 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

ErgSpeed Rowing Logbook ships an update every 9 days, IDfier monthly. The most recent releases landed on October 8, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | ErgSpeed Rowing Logbook | IDfier |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 9 days** | Monthly |
| Monetization | Freemium | — |
| Size | 4 MB | 210 MB |
| Requires iOS | 26.0 | **15.1** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Sports Stats Limited](https://appshunter.io/developer/1481193925) | [SoLiDware AB](https://appshunter.io/developer/1686979757) |

## 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 | $4.99 | per month |
| Yearly Subscription | $24.99 | per year |
| Lifetime Access | $49.99 | one-time |


### IDfier

[App page](https://appshunter.io/ios/app/idfier/id6448929870)

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| IDfier Basic | $2.99 | per month |
| IDfier Pro | $9.99 | per month |
| Individual | $24.99 | per year |
| IDfier Pro | $84.99 | per year |
| One Time Verification | $1.49 | one-time |
| One+One Verification | $2.49 | one-time |


## Frequently asked questions

### Is ErgSpeed Rowing Logbook free?

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

### Is IDfier free?

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

### Do ErgSpeed Rowing Logbook or IDfier have ads?

Neither ErgSpeed Rowing Logbook nor IDfier shows ads.

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

ErgSpeed Rowing Logbook ships an update every 9 days, and IDfier monthly. Most recently, ErgSpeed Rowing Logbook was updated on October 8, 2026 and IDfier on October 6, 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.*