# ErgData vs Intervals.icu Companion

The clearest difference is review sentiment: Intervals.icu Companion at 93% against ErgData's 45%. Intervals.icu Companion also leads on rating (4.9 vs 4.7). ErgData's advantage is in-app purchases (none vs 4) and ratings volume (5.1K vs 35). On price, update cadence, ads and monetization model there is nothing between them.

Both are free to download. Intervals.icu Companion sells 4 in-app purchases, starting at $9.99 per year. ErgData asks for nothing beyond the download.

Intervals.icu Companion holds the better App Store score, 4.9 against 4.7. That said, the two scores are not equally well evidenced: ErgData has 5.1K ratings behind it against 35, so its average is the more settled of the two. Written reviews point the same way: 45% of ErgData's written reviews are positive against 93% of Intervals.icu Companion's.

ErgData ships an update every 2 weeks, Intervals.icu Companion every 3 weeks. The most recent releases landed on September 26, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | ErgData | Intervals.icu Companion |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (5.1K ratings)](https://appshunter.io/ios/app/ergdata/id561716382/reviews) | **[4.9 (35 ratings)](https://appshunter.io/ios/app/intervalsicu-companion/id6739638454/reviews)** |
| Number of ratings | **5.1K** | 35 |
| Positive reviews | 45.4% of reviews | **93.3% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 3 weeks |
| Monetization | Free | Free |
| Size | 74 MB | 70 MB |
| Requires iOS | **16.0** | 18.6 |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Concept2, Inc.](https://appshunter.io/developer/446481798) | [McEwen Labs LLC](https://appshunter.io/developer/1786409246) |

## What reviewers say

### ErgData

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

This app acts as a personal training partner for Concept2 equipment. It allows users to set up custom workouts, view real-time stats, track progress, and sync data with online platforms. It also offers workout of the day challenges and detailed post-workout analysis.

**Highlights:** Custom workout setup, Real-time workout stats, Progress tracking, Sync with Concept2 Logbook, Workout of the Day, Post-workout analysis, Apple Watch compatibility

**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


### Intervals.icu Companion

[App page](https://appshunter.io/ios/app/intervalsicu-companion/id6739638454)

This companion app visualizes your fitness, fatigue, and form trends using data from Intervals.icu. It offers configurable widgets for desktop and home screens, along with Apple Watch faces, to provide quick access to your key metrics and automatic data updates.

**Highlights:** Interactive Fitness, Fatigue & Form Graph, Apple Watch App for data viewing, Multi-Platform Widgets (iOS, iPadOS, watchOS, macOS), Vitals Tracking (HRV, readiness, sleep), Automatic Data Updates via notifications, Sports Summary Widget for goal tracking, Customizable Data Settings

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Yearly Supporter | $9.99 | per year |
| Tip | $9.99 | one-time |
| Support Tip | $19.99 | one-time |
| Tip | $19.99 | one-time |


## Frequently asked questions

### Is ErgData free?

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

### Is Intervals.icu Companion free?

Intervals.icu Companion is free to download, with in-app purchases available.

### Which has better reviews, ErgData or Intervals.icu Companion?

Intervals.icu Companion is rated higher. ErgData averages 4.7 out of 5 from 5.1K ratings, while Intervals.icu Companion averages 4.9 from 35 ratings.

### Do ErgData or Intervals.icu Companion have ads?

Neither ErgData nor Intervals.icu Companion shows ads.

### Which is updated more often, ErgData or Intervals.icu Companion?

ErgData ships an update every 2 weeks, and Intervals.icu Companion every 3 weeks. Most recently, ErgData was updated on September 26, 2026 and Intervals.icu Companion on September 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.*