# ErgData vs MRT Optimal Fitness

The clearest difference is ratings volume: ErgData at 6.2K against MRT Optimal Fitness's 1. ErgData also leads on update cadence (fortnightly vs every 2 months). MRT Optimal Fitness's advantage is rating (5.0 vs 4.7) and iOS requirement (13.0 vs 16.0). On price, ads, in-app purchases and monetization model there is nothing between them.

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

MRT Optimal Fitness holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: ErgData has 6.2K ratings behind it against 1, so its average is the more settled of the two.

ErgData ships an update fortnightly, MRT Optimal Fitness every 2 months. The most recent releases landed on November 4, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | ErgData | MRT Optimal Fitness |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (6.2K ratings)](https://appshunter.io/ios/app/ergdata/id561716382/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/mrt-optimal-fitness/id6743253435/reviews)** |
| Number of ratings | **6.2K** | 1 |
| Positive reviews | 47.2% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 2 months |
| Monetization | Free | Free |
| Size | 75 MB | 39 MB |
| Requires iOS | 16.0 | **13.0** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Concept2, Inc.](https://appshunter.io/developer/446481798) | [JAG Athletics LLC](https://appshunter.io/developer/1802066848) |

## What reviewers say

### ErgData

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

This training partner app allows you to set up and track workouts from your phone or tablet. View customized stats, monitor progress, and sync data with your Concept2 Online Logbook. It offers detailed post-workout analysis and optional voice guidance.

**Highlights:** Workout setup and customization, Real-time workout stats, Progress tracking, Sync with Concept2 Logbook, Post-workout analysis, Optional voice guidance, 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


### MRT Optimal Fitness

[App page](https://appshunter.io/ios/app/mrt-optimal-fitness/id6743253435)

Manage your fitness journey with this app. Easily check into classes, book personal training sessions, and handle your membership details all in one place.

**Highlights:** Class check-in, Book training sessions, Manage membership account, Easy navigation

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ErgData free?

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

### Is MRT Optimal Fitness free?

MRT Optimal Fitness is free to download, with no in-app purchases.

### Which has better reviews, ErgData or MRT Optimal Fitness?

MRT Optimal Fitness is rated higher. ErgData averages 4.7 out of 5 from 6.2K ratings, while MRT Optimal Fitness averages 5.0 from 1 ratings.

### Do ErgData or MRT Optimal Fitness have ads?

Neither ErgData nor MRT Optimal Fitness shows ads.

### Which is updated more often, ErgData or MRT Optimal Fitness?

ErgData ships an update fortnightly, and MRT Optimal Fitness every 2 months. Most recently, ErgData was updated on November 4, 2026 and MRT Optimal Fitness on October 30, 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.*