ErgData vs ChartedSails
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.
ChartedSails
This app provides competitive sailors with professional-grade race analysis to identify performance gaps and improve speed. It automatically logs weather and conditions, tracks maneuvers, and allows for fleet comparison. Start with basic insights for free or unlock advanced features with a subscription.
- Automatic race and condition logging
- Leg-by-leg performance breakdown
- Maneuver and start line analysis
- Fleet comparison and progress tracking
- Offline functionality with automatic sync
- Integration with Garmin/Vakaros GPS and Calypso Wind Instruments
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See exactly where you're losing time, fix it, and win more races. ChartedSails is built specifically for competitive sailors who want professional-grade analysis without the complexity. Whether you're training solo or racing in a fleet, get the insights that help you sail faster. CAPTURE EVERYTHING * Record with your phone or sync from Garmin/Vakaros GPS * Automatic weather and condition logging * Works offline, syncs when connected * Sync your data with your friends automatically * Capture wind data with Calypso Wind Instruments INSTANT RACE ANALYSIS * Automatic leg-by-leg performance breakdown * See where you gained or lost: upwind, downwind, or reaching * Maneuver analysis for every tack and gybe * Start line performance metrics COMPARE & IMPROVE * Automatic fleet comparison - see how you stack up * Learn from faster boats even when sailing alone * Track progress over time and conditions * Build your complete performance logbook TRUSTED BY CHAMPIONS Used by World Champions, Olympic campaigns, and thousands of competitive sailors who've discovered that data doesn't have to be complicated to be powerful. PERFECT FOR: * One-design racing (Laser, Waszp, Moth, A-Class, etc.) * Sailors who want to improve faster * Coaches managing multiple boats * Anyone tired of wondering why they lost FREE TO START Record unlimited sessions, keep a logbook and get basic insights free forever. RACER SUBSCRIPTION The RACER MONTHLY and RACER ANNUAL subscriptions unlock more features of the app: - Race reports (detailed leg-by-leg analysis) - VMG analysis of your sailing sessions (VMG Upwind and Downwind) - Access to all paid features of chartedsails.com on the Web (Photos, Videos, Race editor, etc) All subscriptions include a 15-day free trial. RACER MONTHLY will automatically renew every month. RACER ANNUAL will automatically renew every year. You can manage your subscription directly in the application. Tap your Profile (top-right of the main screen) to cancel at any time. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://www.chartedsails.com/privacy ChartedSails LLC is a small business committed to serving the performance sailing community. Please write to us at ahoy@chartedsails.com for any questions!
Screenshots
Verdict
The clearest difference is in-app purchases: ErgData at none against ChartedSails's 2. ErgData also leads on ads (none vs shown) and ratings volume (5.1K vs 2). ChartedSails's advantage is rating (5.0 vs 4.7). On price, update cadence, device support and iOS requirement 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. ChartedSails sells 2 in-app purchases, starting at $44.99 per month. ErgData asks for nothing beyond the download.
ChartedSails holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: ErgData has 5.1K ratings behind it against 2, so its average is the more settled of the two.
ErgData ships an update every 2 weeks, ChartedSails every 3 weeks. The most recent releases landed on October 13, 2026 and September 23, 2026 respectively.
| Parameter | ErgData | ChartedSails |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (5.1K ratings) | 5.0 (2 ratings) — better |
| Positive reviews | 45.4% of reviews | — |
| Number of ratings | 5.1K — better | 2 |
| Update frequency | Every 2 weeks — better | Every 3 weeks |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Requires iOS | 16.0 | 15.1 — better |
| Further details — not scored | ||
| Size | 74 MB | 116 MB |
| Age rating | 4+ | 4+ |
| Developer | Concept2, Inc. | CHARTEDSAILS LLC |
Customer experience
ErgData
ChartedSails
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
ChartedSails
Not enough reviews yet to summarise bugs or requests.
In-app purchases
ErgData
No in-app purchases
ChartedSails
- Racer Monthly14 Days trial$44.991 Month
- Racer Annual14 Days trial$349.001 Year









