ErgZone vs PocketCox
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ErgZone
Optimize indoor training with real-time performance data, personalized pacing, and engaging challenges. Seamlessly integrates with various fitness machines, automating setup and providing critical metrics to enhance your workouts.
- Easy monitor setup
- Live performance metrics
- Smart interval pacing
- Real-time workout alerts
- Workout variety options
- Performance history tracking
- Community challenges
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ErgZone is a cutting-edge fitness platform designed to optimize your indoor training sessions. By seamlessly integrating with your Concept2, RP3, Rogue, WaterRower, Assault Fitness or FTMS-enabled machines, ErgZone provides real-time performance data, personalized pacing, and engaging challenges to push your limits. Why Choose ErgZone? Designed to streamline your training, ErgZone minimizes setup time, automates monitor configurations, and calculates critical metrics so you can focus on performance, not prep. Key Features: • Easy Monitor Setup: No need to manually set intervals – simply connect to the ergometer, and the app handles the rest. Start moving right away. • Live Metrics: View real-time data during workouts, including time, distance, pace, strokes/minute (SPM), calories, watts, heart rate (HR) zones, and more. • Smart Interval Pacing: Suggested pace per interval based on personal benchmarks (1K, 2K, 5K for rowing and skiing; 2K, 4K, 10K for cycling). • Real-Time Alerts: Instant feedback if your pace, SPM, or split time drifts from the target. • Workout Variety: Options to train by time, distance, or calories with flexibility for mixed or weighted workouts. • Daily Workouts: Access the Concept2 Workout of the Day, plus discover workouts and training plans from top coaches. • Performance History: Save your favorite workouts, track heart rate progress, and monitor key metrics. • Compete & Connect: Join challenges, follow ErgFlix workouts, and interact with our partner coaches who release weekly free workouts. • Beyond Default Metrics: Track advanced metrics like stroke count, drag factor (DF), calories, watts, SPI, HR zones, and more. • Automatic Syncing: Results are automatically uploaded to the Concept2 LogBook. Unlock ErgZone+ for Premium Tools: • Enhanced Metrics & Graphs: View each interval's post-workout heart rate and power zones in a single graph. • Expanded Metrics: Access Drive Length, Max Power, Avg. Force, Force Curve, and more. The app remembers your last-used metrics for easy setup. • Time Cap & AMRAP: For added versatility, use automatic time-capped workouts and AMRAP (as many rounds as possible). • Flexible Targets: Set workout intensity using power metrics like FTP (Functional Threshold Power), SPI, or Watts percentage. • ReRow, ReSki, ReRide: Revisit previous sessions and strive to beat your pace or time. • Communities: Create and join communities, share workouts, and engage with friends. Enable leaderboards for a fun, competitive edge. • Apple Health Integration: Sync workouts and heart rate data directly to Apple Health. • Heart Rate Monitor: Connect your favorite Bluetooth HRM to track your heart rate in real-time during workouts. • Web Dashboard: Manage workouts, schedule training, and view live stats on a computer. • MultiErg Workouts: Create custom workouts incorporating two or all three Concept2 machines in a single workout. • Dynamic Interval Intensity: Set workout pace based on a previous interval. • Apple Watch Integration: Capture heart rate data from our Apple Watch app. • Organize Your Training: Create groups, libraries, and training plans to manage better and organize your workouts. • FIT Workouts: Track non-erg workouts such as weight training, HYROX, CrossFit, etc. Requirements: • Supported Machines: Concept2 RowErg, BikeErg, SkiErg with PM5, RP3 Rower, Rogue Echo Bike or Rower, WaterRower S4 (with ComModule or CR BLE), FTMS-enabled machines. • Device: iPhone or iPad Terms of Use: https://www.erg.zone/terms
PocketCox
This app uses your Apple Watch to monitor on-water rowing performance, providing detailed metrics like stroke rate, speed, and heart rate. Analyze your sessions with graphs and share them across popular platforms. It's designed for rowers of all levels aiming to improve their training.
- On-water rowing workout tracking
- Comprehensive performance metrics
- Workout segmentation
- Automatic workout pause
- Detailed session analysis on iPhone
- Workout sharing to Strava and others
- Secure data storage in Apple Health
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PocketCox is the most advanced rowing performance monitor for your wrist. It leverages the high-end sensors in your Apple Watch to track your on-water rowing workouts, and delivers you with comprehensive data, helping you elevate your training without the need for a dedicated device. PocketCox is the perfect tool for both amateurs and professional rowers looking to improve their performance on the water. TRACKED METRICS • Stroke Rate • Speed / Split • Distance • Number of Strokes • Recovery-Drive Ratio • Heart Rate • Calories Burned FEATURES • Record rowing workouts with your Apple Watch. • Easy-to-read design optimized for legibility on the water. • Break down your workout into individual segments. • Workout gets automatically paused if you stop taking strokes. • Review and analyze your rowing sessions on your iPhone with detailed graphs showing split, stroke rate, ratio and hear rate. • Share your workouts effortlessly on Strava, Concept2 Logbook, Rowsandall.com, and Intervals.icu. • All data is stored securely and privately in Apple Health and iCloud. --- PocketCox requires an Apple Watch running watchOS 9.1 or later.
Screenshots
Verdict
The clearest difference is ratings volume: ErgZone at 458 against PocketCox's 15. ErgZone also leads on iOS requirement (13.4 vs 17.0). PocketCox's advantage is update cadence (every 3 weeks vs every 2 months). 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. ErgZone sells 2 in-app purchases, starting at $4.99 per month and PocketCox sells 2 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.
On the App Store both sit at effectively the same score — 4.8 for ErgZone against 4.9 for PocketCox. That said, the two scores are not equally well evidenced: ErgZone has 458 ratings behind it against 15, so its average is the more settled of the two. Written reviews are what separate them: 81% of ErgZone's written reviews are positive against 86% of PocketCox's.
ErgZone ships an update every 2 months, PocketCox every 3 weeks. The most recent releases landed on September 27, 2026 and September 13, 2026 respectively.
| Parameter | ErgZone | PocketCox |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (458 ratings) | 4.9 (15 ratings) — better |
| Positive reviews | 81.2% of reviews | 85.7% of reviews — better |
| Number of ratings | 458 — better | 15 |
| Update frequency | Every 2 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Freemium |
| Devices | iPhone, iPad, iPod, Apple Watch — better | iPhone, iPad, Apple Watch |
| Requires iOS | 13.4 — better | 17.0 |
| Further details — not scored | ||
| Size | 33 MB | 34 MB |
| Age rating | 4+ | 4+ |
| Developer | ERGZONE LLC | Nicolas Camenisch |
Customer experience
ErgZone
PocketCox
Bugs and requests
ErgZone
Reported bugs
9 issues- Heart monitor sync issues with Samsung Galaxy watch
- Workouts not appearing in logbook when connected to ErgData
- Inaccurate total time in uploads
- Rest distance not included in Strava upload
- Group membership premium features unclear
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- Workouts not shown chronologically
- Occasional hesitation to connect to PM5
- Cannot figure out how to connect to PM5
- Workout completion and upload to logbook could be more intuitive
Requested features
7 requests- Sync with Samsung Galaxy watch
- Add a beep function for interval changes
- Confirmation pop-up for unsaved workout changes
- Require unique names for workouts
- Apple Health integration
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- Native Apple Health synchronization
- Sharing with Apple Health
PocketCox
Not enough reviews yet to summarise bugs or requests.
In-app purchases
ErgZone
- EZ+ Monthly7 Days trial$4.991 Month
- EZ+ Annual$49.991 Year
PocketCox
- PocketCox Pro3 Days trial$1.991 Month
- PocketCox Pro14 Days trial$12.991 Year









