# ErgData vs Watta

The clearest difference is ratings volume: ErgData at 6.5K against Watta's 2. Watta's advantage is rating (5.0 vs 4.8). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Watta holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: ErgData has 6.5K ratings behind it against 2, so its average is the more settled of the two.

ErgData ships an update fortnightly, Watta every 2 weeks. The most recent releases landed on November 14, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | ErgData | Watta |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (6.5K ratings)](https://appshunter.io/ios/app/ergdata/id561716382/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/watta-rowing-and-erg-tracker/id6758580968/reviews)** |
| Number of ratings | **6.5K** | 2 |
| Positive reviews | 47.2% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 2 weeks** |
| Monetization | Free | Free |
| Size | 76 MB | 38 MB |
| Requires iOS | 16.0 | **15.1** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Concept2, Inc.](https://appshunter.io/developer/446481798) | [STEPHEN CHRISTOPHER MILTON](https://appshunter.io/developer/1873767248) |

## What reviewers say

### ErgData

[App page](https://appshunter.io/ios/app/ergdata/id561716382)

This training partner app allows you to set up and customize workouts, view real-time stats, and track your progress. It syncs with a popular online logbook and offers detailed post-workout analysis. Compatible with various devices, it enhances your fitness journey with data-driven insights.

**Highlights:** Customizable workout setup, Real-time workout stats, Progress tracking, Syncs with Concept2 Logbook, Post-workout analysis, Workout of the Day feature, Voice guidance

**Features:** Apple Watch app

**In-app purchases:** none

**What reviewers like**

- 🚀 Great app
- 👍 Excellent stats
- 👍 Easy to use
- 👍 Seamless sync with Concept2 logbook
- 👍 Customizable heart rate zones

**What reviewers complain about**

- 🐛 Connection issues with PM5
- 🐛 Unreliable heart rate monitoring
- 🐛 Sync issues with Apple Health
- 🐛 Crashes and data loss
- 🐛 Frequent disconnections

**Reported bugs**

- Workout data not saving
- Heart rate data freezing
- Disconnects during workouts
- Sync issues with Apple Health and Strava
- Login issues and frequent logouts

**Requested features**

- Add friend mode
- Integrate Apple Watch support
- Add manual workout entry
- Implement landscape mode for iPad
- Integrate pace calculator


### Watta

[App page](https://appshunter.io/ios/app/watta-rowing-and-erg-tracker/id6758580968)

Effortlessly log your rowing, biking, and skiing workouts by simply taking a photo of your machine's screen. AI automatically extracts your performance data, organizing it into a comprehensive training log. Connect with your club, compete on leaderboards, and share your progress with teammates.

**Highlights:** AI photo data extraction, Automatic workout logging, Support for Concept2 monitors, Manual workout entry, Training history and trends, Club and squad features, Leaderboards and competition

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

**In-app purchases:** none


## Frequently asked questions

### Is ErgData free?

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

### Is Watta free?

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

### Which has better reviews, ErgData or Watta?

Watta is rated higher. ErgData averages 4.8 out of 5 from 6.5K ratings, while Watta averages 5.0 from 2 ratings.

### Do ErgData or Watta have ads?

Neither ErgData nor Watta shows ads.

### Which is updated more often, ErgData or Watta?

ErgData ships an update fortnightly, and Watta every 2 weeks. Most recently, ErgData was updated on November 14, 2026 and Watta on November 9, 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.*