Comparison

RowPower vs Watta

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

Head to head
About

RowPower

Visualize your rowing performance with this app, connecting directly to your Concept2 ergometer. It offers a clean interface to track trends, view force curves, and monitor key metrics like pace and heart rate without manual data entry.

Highlights
  • Visualize force curve
  • Track trends over time
  • Visualize pace, heart rate, stroke rate
  • Connects to Concept2 erg
  • Clean, minimal design
  • No manual data entry
Features
Read full description

RowPower is the easiest way to visualize and understand your rowing data — but only if you use a Concept2 rower. Connect your Concept2 erg (RowErg) and instantly visualize your workouts. RowPower helps you visualize your performance. Features: • Clean, minimal design built for rowers • Visualize force curve • Track trends over time • Visualize pace, heart rate, stroke rate, splits, distance, and more • Works with RowErg RowPower is for data-driven rowers who want clarity — not clutter. No manual data entry. No complex setup. Just connect your Concept2 account and start seeing your progress. Note: RowPower only works with Concept2 machines.

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

RowPower4 screens
Watta4 screens

Verdict

The call

The clearest difference is rating: Watta at 5.0 against RowPower's 4.0. Watta also leads on in-app purchases (none vs 1) and iOS requirement (15.1 vs 18.2). RowPower's advantage is update cadence (every 4 days vs every 2 weeks). On price, ratings volume, ads and device support 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. RowPower sells 1 one-off in-app purchase. Watta asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Watta holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

UpkeepUpdate frequency

RowPower ships an update every 4 days, Watta every 2 weeks. The most recent releases landed on October 1, 2026 and October 24, 2026 respectively.

Scorecard5 real differences · 4 level
RowPower versus Watta: the parameters behind the verdict, then further details
ParameterRowPowerWatta
PriceFreeFree
Rating4.0 (1 ratings)5.0 (1 ratings) — better
Number of ratings11
Update frequencyEvery 4 days — betterEvery 2 weeks
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPadiPhone, iPod
Requires iOS18.215.1 — better
Further details — not scored
Size6 MB37 MB
Age rating4+4+
DeveloperThibault MarichalSTEPHEN CHRISTOPHER MILTON

Customer experience

RowPower

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

Watta

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

In-app purchases

1 purchases

RowPower

One-time1
  • Remove Ads$2.99
None

Watta

No in-app purchases

Questions

Is RowPower free?
RowPower 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, RowPower or Watta?
Watta is rated higher. RowPower averages 4.0 out of 5 from 1 ratings, while Watta averages 5.0 from 1 ratings.
Do RowPower or Watta have ads?
Neither RowPower nor Watta shows ads.
Which is updated more often, RowPower or Watta?
RowPower ships an update every 4 days, and Watta every 2 weeks. Most recently, RowPower was updated on October 1, 2026 and Watta on October 24, 2026.

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