Comparison

ErgTracker vs Watta

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

Head to head
About

ErgTracker

Features
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ErgTracker is an easy way to scan, save, track, and share your Concept2 rowing workouts. Instead of manually entering data, simply scan your PM5 screen. ErgTracker extracts your workout information, saves it to your history, and lets you review your training over time — with one-tap sharing to Strava. Built specifically for indoor rowers who want a simple way to log and share training sessions. What ErgTracker Does Scan • Scan your Concept2 PM5 screen • Automatically extract distance, time, splits, rate, and heart rate • Supports interval and steady-state workouts Save • Save workouts to your device • No manual data entry • Clean, structured workout records Track • Full workout history • Calendar view for weekly structure • Detailed workout view with all intervals • Review training over time Share to Strava • Generate a workout summary image • Share directly to Strava • Save the image to Photos • Useful for sharing with coaches and training partners Built for Rowers ErgTracker is designed around how indoor rowers train: • Focus on pace, rate, and intervals • Clear session structure • Fast logging after workouts • Simple, distraction-free interface Whether you row occasionally or train regularly, ErgTracker helps you keep your workout log organized and easy to share. Privacy & Data Workouts are stored locally on your device. No account is required to scan, save, and track workouts. Strava sharing is optional and only used if you choose to connect your account. ErgTracker is not affiliated with Concept2.

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

ErgTracker4 screens
Watta4 screens

Verdict

The call

The clearest difference is in-app purchases: Watta at none against ErgTracker's 1. Watta also leads on ads (none vs shown) and update cadence (every 2 weeks vs every 2 months). On price, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. ErgTracker sells 1 one-off in-app purchase. Watta asks for nothing beyond the download.

UpkeepUpdate frequency

ErgTracker ships an update every 2 months, Watta every 2 weeks. Both last shipped on October 24, 2026.

Scorecard3 real differences · 6 level
ErgTracker versus Watta: the parameters behind the verdict, then further details
ParameterErgTrackerWatta
PriceFreeFree
Rating—5.0 (1 ratings) — better
Number of ratings—1 — better
Update frequencyEvery 2 monthsEvery 2 weeks — better
AdsYesNo — better
In-app purchasesYesNo — better
Monetization—Free
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.115.1
Further details — not scored
Size39 MB37 MB
Age rating4+4+
DeveloperThibault MarichalSTEPHEN CHRISTOPHER MILTON

In-app purchases

1 purchases

ErgTracker

One-time1
  • Remove Ads$4.99
None

Watta

No in-app purchases

Questions

Is ErgTracker free?
ErgTracker is free to download, with in-app purchases available.
Is Watta free?
Watta is free to download, with no in-app purchases.
Do ErgTracker or Watta have ads?
ErgTracker shows ads; Watta does not.
Which is updated more often, ErgTracker or Watta?
ErgTracker ships an update every 2 months, and Watta every 2 weeks. Most recently, ErgTracker was updated on October 24, 2026 and Watta on October 24, 2026.

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