Comparison

ErgZone vs Watta

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Easy monitor setup
  • Live performance metrics
  • Smart interval pacing
  • Real-time workout alerts
  • Workout variety options
  • Performance history tracking
  • Community challenges
Features
Read full description

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

About

Watta

Effortlessly log your rowing, biking, and skiing workouts by simply taking a photo of your machine's screen. AI automatically extracts your performance data, organizing it into a comprehensive training log. Connect with your club, compete on leaderboards, and share your progress with teammates.

Highlights
  • AI photo data extraction
  • Automatic workout logging
  • Support for Concept2 monitors
  • Manual workout entry
  • Training history and trends
  • Club and squad features
  • Leaderboards and competition
Features
Read full description

Photograph your Concept2 monitor after a piece and Watta logs the whole workout. No typing, no cables, no pairing needed. Every session is scored 0–100 and kept in your training log. SNAP YOUR ERG. WATTA LOGS IT. Take a photo of the PM5 summary screen, or pick one from your camera roll. Watta reads distance, time, average split, stroke rate and every interval, plus watts, heart rate, calories and drag factor when the monitor shows them. You check the numbers before anything is saved. Photograph several screens (summary, splits, heart rate) and Watta reads them as one workout. EVERY SESSION SCORED 0–100 The Effort Score rates how hard you really worked, from four parts: • Cardiac Load: your average heart rate against your heart-rate reserve • Work Output: watts and duration, scaled for your body weight • Pacing: how even your splits were • Economy: watts per stroke Zones: Recovery, Building, Training and Peak. HEART RATE ZONES Pair a strap to the PM5 so heart rate shows on the screen, and Watta labels each piece by zone using your resting and max heart rate. YOUR WHOLE TRAINING LOG Every workout in one place, with personal bests for every standard distance on each machine, progress charts, streaks and achievement badges. Import the sessions you upload to the Concept2 Logbook. NEW: SEND WORKOUTS TO YOUR PM5 Got a PM5? Build a workout in Watta (a 2k test, an interval set, a steady piece), save it to your workout library, and tap Start on my PM5. Watta sets it up on the monitor over Bluetooth, ready to row. Then snap the screen when you're done. COACHING Coaches keep a library of sessions, build training plans of up to 12 weeks, and send them to individual athletes or a whole boat. Athletes accept a session, row it, snap the result and mark it done, and the coach sees how it went against the plan. Invite rowers by email or with a crew code, even before they have Watta. CLUBS AND SQUADS Join your club with an invite code, train with your squad, see their workouts in your feed, and compare on club and squad leaderboards. BUILT FOR CONCEPT2 Works with the RowErg, SkiErg and BikeErg, on PM5, PM4 and PM3 monitors. Sending workouts over Bluetooth needs a PM5. Photos of other brands of rower aren't read automatically, so enter those sessions by hand. Free to download. Every erg matters. Watta is a training log, not a medical device. Talk to your doctor before starting a new exercise programme.

Screenshots

ErgZone4 screens
Watta4 screens

Verdict

The call

The clearest difference is in-app purchases: Watta at none against ErgZone's 2. Watta also leads on update cadence (every 2 weeks vs every 2 months). ErgZone's advantage is ratings volume (501 vs 1) and device support (4 vs 2). On price, rating 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. ErgZone sells 2 in-app purchases, starting at $4.99 per month. Watta asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Watta holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: ErgZone has 501 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

ErgZone ships an update every 2 months, Watta every 2 weeks. Both last shipped on October 26, 2026.

Scorecard6 real differences · 4 level
ErgZone versus Watta: the parameters behind the verdict, then further details
ParameterErgZoneWatta
PriceFreeFree
Rating4.8 (501 ratings)5.0 (1 ratings) — better
Positive reviews81.6% of reviews—
Number of ratings501 — better1
Update frequencyEvery 2 monthsEvery 2 weeks — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPod, Apple Watch — betteriPhone, iPod
Requires iOS13.4 — better15.1
Further details — not scored
Size33 MB37 MB
Age rating4+4+
DeveloperERGZONE LLCSTEPHEN CHRISTOPHER MILTON

Customer experience

ErgZone

All ratings458 ratings
Positive95.4%
Neutral1.7%
Negative2.8%
Written reviews76 reviews
Positive81.6%
Neutral3.9%
Negative14.5%

Watta

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

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
Show 4 more
  • 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
Show 2 more
  • Native Apple Health synchronization
  • Sharing with Apple Health

Watta

Not enough reviews yet to summarise bugs or requests.

In-app purchases

2 purchases

ErgZone

Subscriptions2
  • EZ+ Monthly7 Days trial$4.991 Month
  • EZ+ Annual$49.991 Year
None

Watta

No in-app purchases

Questions

Is ErgZone free?
ErgZone is free to download, with in-app purchases available.
Is Watta free?
Watta is free to download, with no in-app purchases.
Which has better reviews, ErgZone or Watta?
Watta is rated higher. ErgZone averages 4.8 out of 5 from 501 ratings, while Watta averages 5.0 from 1 ratings.
Do ErgZone or Watta have ads?
Neither ErgZone nor Watta shows ads.
Which is updated more often, ErgZone or Watta?
ErgZone ships an update every 2 months, and Watta every 2 weeks. Most recently, ErgZone was updated on October 26, 2026 and Watta on October 26, 2026.

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