# ErgScan vs Performance Dynamics

The clearest difference is in-app purchases: Performance Dynamics at none against ErgScan's 4. ErgScan's advantage is update cadence (every 8 days vs every 9 months) and device support. On price and iOS requirement there is nothing between them.

Both are free to download. ErgScan sells 4 in-app purchases, starting at $1.99 per 7 days. Performance Dynamics asks for nothing beyond the download.

ErgScan ships an update every 8 days, Performance Dynamics every 9 months. The most recent releases landed on June 20, 2026 and September 7, 2026 respectively.

## The numbers

| Metric | ErgScan | Performance Dynamics |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (13 ratings)](https://appshunter.io/ios/app/ergscan-rowing-workouts-log/id1661654775/reviews)** | — |
| Number of ratings | **13** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | — |
| Update frequency | **Every 8 days** | Every 9 months |
| Monetization | Free with in-app purchases | — |
| Size | 135 MB | 55 MB |
| Requires iOS | 15.5 | **14.0** |
| Devices | **iPhone, iPod** | — |
| Age rating | 4+ | 4+ |
| Developer | [BUNEME KYAKILIKA](https://appshunter.io/developer/1540545215) | [TeamUp Sports](https://appshunter.io/developer/1449504626) |

## What reviewers say

### ErgScan

[App page](https://appshunter.io/ios/app/ergscan-rowing-workouts-log/id1661654775)

Effortlessly log indoor rowing machine workouts by taking a photo of your screen. AI automatically detects and saves your session data, eliminating manual entry. Seamlessly sync your workouts with popular training platforms like Strava and TrainingPeaks.

**Highlights:** AI-powered photo scanning for workout data, Automatic detection of splits and session details, Syncs with Strava, TrainingPeaks, Concept2 Logbook, Optimized for Concept2 rowing machines, Structured workout data without manual entry

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Subscription | $1.99 | per 7 days |
| Monthly | $4.99 | per month |
| ErgScan Premium Annual | $29.99 | per year |
| ErgScan Premium | $12.99 | one-time |


### Performance Dynamics

[App page](https://appshunter.io/ios/app/performance-dynamics/id6447365555)

**In-app purchases:** none


## Frequently asked questions

### Is ErgScan free?

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

### Is Performance Dynamics free?

Performance Dynamics is free to download, with no in-app purchases.

### Which is updated more often, ErgScan or Performance Dynamics?

ErgScan ships an update every 8 days, and Performance Dynamics every 9 months. Most recently, ErgScan was updated on June 20, 2026 and Performance Dynamics on September 7, 2026.

---

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