# ErgData vs btwb

The clearest difference is monetization model: ErgData at free against btwb's free with in-app purchases. ErgData also leads on ratings volume (5.1K vs 1.5K). btwb's advantage is update cadence (weekly vs every 2 weeks). On price, rating, review sentiment and ads there is nothing between them.

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

On the App Store both sit at effectively the same score — 4.7 for ErgData against 4.6 for btwb. Both are backed by a comparable volume of ratings — 5.1K and 1.5K respectively. Written reviews are what separate them: 45% of ErgData's written reviews are positive against 53% of btwb's.

ErgData ships an update every 2 weeks, btwb weekly. The most recent releases landed on October 13, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | ErgData | btwb |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (5.1K ratings)](https://appshunter.io/ios/app/ergdata/id561716382/reviews)** | [4.6 (1.5K ratings)](https://appshunter.io/ios/app/btwb-wod-tracking/id583688662/reviews) |
| Number of ratings | **5.1K** | 1.5K |
| Positive reviews | 45.4% of reviews | **53.2% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Weekly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 74 MB | 265 MB |
| Requires iOS | 16.0 | **15.6** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPod, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Concept2, Inc.](https://appshunter.io/developer/446481798) | [BTWB, LLC](https://appshunter.io/developer/583688665) |

## 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


### btwb

[App page](https://appshunter.io/ios/app/btwb-wod-tracking/id583688662)

Log your workouts, discover new ones, and connect with your fitness community. Track progress, analyze performance, and manage nutrition with a comprehensive fitness tracking tool.

**Highlights:** Daily workout programming, Discover millions of WODs, Track workout results, Macro and nutrition tracking, Community and social features, Performance analysis and badges, Gym virtual programming

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

**In-app purchases:** none

**What reviewers like**

- 🚀 Great app for tracking workouts
- 👍 Comprehensive fitness tracking features
- 🔥 Best CrossFit app on the market
- 💪 Helps identify strengths and weaknesses
- 🏆 Excellent for measuring progress over time

**What reviewers complain about**

- 🐛 Buggy and glitchy at times
- 🤔 Confusing and not very user-friendly
- 📱 Poor mobile app experience
- 💰 Expensive subscription model
- 🤯 Frustrating issues with logging workouts

**Reported bugs**

- Subscription cancellation and billing problems
- Frequent crashes and white screens
- Inability to log certain workout types
- Barcode scanner and movement tracking issues
- Problems with data syncing and history display

**Requested features**

- Add dark mode or black background option
- Integrate with Apple Health and other fitness apps
- Improve custom workout creation and logging
- Provide better social/community features
- Fix issues with loading and saving workout data


## Frequently asked questions

### Is ErgData free?

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

### Is btwb free?

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

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

ErgData is rated higher. ErgData averages 4.7 out of 5 from 5.1K ratings, while btwb averages 4.6 from 1.5K ratings.

### Do ErgData or btwb have ads?

Neither ErgData nor btwb shows ads.

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

ErgData ships an update every 2 weeks, and btwb weekly. Most recently, ErgData was updated on October 13, 2026 and btwb on October 8, 2026.

---

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