ErgData vs btwb
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ErgData
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.
- Custom workout setup
- Real-time workout stats
- Progress tracking
- Sync with Concept2 Logbook
- Workout of the Day
- Post-workout analysis
- Apple Watch compatibility
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ErgData from Concept2 is your personal training partner. Set up workouts from your phone or tablet, view customized stats and information during workouts, track your progress, sync with the Concept2 Online Logbook, take part in the Workout of the Day and much more. Features -Set up workouts from your phone, making it simple to create even the most complex of interval workouts. You can choose to store workouts as favorites or rerow past efforts straight from ErgData. -Set the Concept2 Workout of the Day on the monitor with a single tap. -Compatible with the Apple Watch. Watch users can now see real-time heart rate data on the screen during the workout and in analysis afterwards. -Choose from different workout display options, including small, medium and large data screens, a pace graph screen, an interval and split table or a pace boat. Easily swipe between screens during your workout. Customize the data shown to suit you. -Syncs with the Concept2 Online Logbook, making it easy for you to take part in our many challenges. From the Online Logbook, your workouts can get sent to platforms such as Strava, Garmin Connect or Training Peaks. -Detailed post-workout analysis helps you know exactly what happened during your workout. See all your interval and split data, as well as pace and rate graphs, plus how long you spent in each heart rate zone. -Optional voice guidance to send audible workout data and results. Technical Specifications -Compatible with the PM5. -Compatible with the Concept2 RowErg, SkiErg and BikeErg -Connects to Apple Health -Connects to PM5 via Bluetooth only Note: Please do not have a USB stick in the PM5 at the same time as using ErgData, as this may prevent workouts being saved.
btwb
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.
- 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
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btwb, the world's premier workout tracker, brings fitness communities together, in person & remotely. We are the world's largest workout Log with 100+ million results and counting. WORKOUTS - Get daily programming at your fingertips with btwb's Varied Not Random workouts. 4 versions available daily: Performance, Fitness, Dumbbell Only, and No Equipment. - Post results for every workout and/or create your own. - Discover the perfect workout among 12+ Million Unique WODs. - Perfectly capture and share your workout experience with attached images and location tagging. - See how you stack up against the world with World-Wide Leaderboards. GYMS - Keep your community connected by taking your gym virtual. Deliver custom programming to groups and individuals, include personalized movement demos and WOD briefs, view member activity and results via gym feeds and leaderboards, and encourage members with emojis & comments through private Squads. MACROS - Track your Macros. Get the best features of other macro tracking apps combined with our best-in-class workout tracking. With over 700k grocery items, 160k restaurant items, and 13k common foods, find exactly the food you’re looking for by searching our library or by scanning the barcode of your favorite packaged item! You can even create your own custom entries! Set your own macronutrient targets, or have coaches set them for you. - Set your own macronutrient targets, or have coaches set them for you. SOCIAL - Create private Squads and build Follow lists to keep up with your friends' results. - Use direct messaging to converse about fitness with individuals and groups. ANALYSIS - Earn badges for various workouts, gymnastics maxes, 1RM lifts, and running & rowing intervals. - Discover potential major and minor strength, mobility, and technique issues in specific categories with Imbalances. - How fit are you? (1-100) Work to unlock your Fitness Level. Track body fat, benchmarks and more!
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | ErgData | btwb |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (5.1K ratings) — better | 4.6 (1.5K ratings) |
| Positive reviews | 45.4% of reviews | 53.2% of reviews — better |
| Number of ratings | 5.1K — better | 1.5K |
| Update frequency | Every 2 weeks | Weekly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPod, Apple Watch |
| Requires iOS | 16.0 | 15.6 — better |
| Further details — not scored | ||
| Size | 74 MB | 265 MB |
| Age rating | 4+ | 4+ |
| Developer | Concept2, Inc. | BTWB, LLC |
Customer experience
ErgData
btwb
User reviews
ErgData
From 5.1K App Store ratingsWhat we love
- 🚀 Great app
- 👍 Excellent stats
- 👍 Easy to use
- 👍 Seamless sync with Concept2 logbook
- 👍 Customizable heart rate zones
Room to improve
- 🐛 Connection issues with PM5
- 🐛 Unreliable heart rate monitoring
- 🐛 Sync issues with Apple Health
- 🐛 Crashes and data loss
- 🐛 Frequent disconnections
btwb
From 1.5K App Store ratingsWhat we love
- 🚀 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
Room to improve
- 🐛 Buggy and glitchy at times
- 🤔 Confusing and not very user-friendly
- 📱 Poor mobile app experience
- 💰 Expensive subscription model
- 🤯 Frustrating issues with logging workouts
Bugs and requests
ErgData
Reported bugs
6 issues- Workout data not saving
- Heart rate data freezing
- Disconnects during workouts
- Sync issues with Apple Health and Strava
- Login issues and frequent logouts
Show 1 moreShow fewer
- Incompatibility with older firmware versions
Requested features
8 requests- Add friend mode
- Integrate Apple Watch support
- Add manual workout entry
- Implement landscape mode for iPad
- Integrate pace calculator
Show 3 moreShow fewer
- Add recovery heart rate tracking
- Display METS data
- Allow custom heart rate zones in logbook
btwb
Reported bugs
5 issues- 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
5 requests- 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
In-app purchases
ErgData
No in-app purchases
btwb
No in-app purchases








