Track your rowing for weight loss — the simple way

By the Watta Team · Updated 10 August 2026

Rowing is one of the most effective exercises for weight loss, engaging 86% of your muscles in a low-impact, high-calorie-burn movement. Watta makes tracking your rowing sessions effortless with AI-powered photo logging, calorie data, and Effort Scores.

Rowing App for Weight Loss: Watta is a free, AI-powered rowing workout tracker. Snap your erg screen to capture data instantly. Get a 0-100 Effort Score combining cardiac load, work output, pacing, and economy. Track heart rate zones via the Karvonen method. Join clubs and squads to train with your crew.

The Problem

Hard to know if rowing workouts are effective

Without tracking calories, distance, and intensity, it is impossible to know if your rowing sessions are contributing meaningfully to your weight loss goals. Many people row aimlessly without data.

Motivation fades without visible progress

Weight loss from exercise happens gradually. Without a record of sessions completed, distances rowed, and fitness improvements, it is easy to feel like nothing is working and quit.

Calorie estimates from other apps are unreliable

Generic fitness trackers estimate rowing calories based on time and body weight alone. The Concept2 monitor calculates calories from actual power output, which is far more accurate but rarely captured.

How Watta Helps

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Accurate Calorie Tracking

Watta extracts calorie data directly from your Concept2 PM5 screen, which calculates calories from actual power output. Far more accurate than watch-based estimates.

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Effort Score for Consistency

The 0-100 Effort Score gives you a clear target for each session. Aim for consistent scores to build a sustainable exercise habit rather than burning out with unsustainable intensity.

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Streaks & Achievements

Watta rewards consistency with weekly streaks and achievement badges. Stay motivated with tangible milestones as you build your rowing habit for weight management.

How It Works

Snap your erg screen

Take a photo of your PM5 display after your workout. Gallery upload works too.

AI extracts your data

Watta reads every metric — time, split, distance, stroke rate, heart rate, and calories.

Get your Effort Score

A 0-100 score combining cardiac load, work output, pacing, and economy shows exactly how hard you worked.

Watta is Available Now

Download Watta and start tracking your workouts today.

Download on the App Store

Frequently Asked Questions

Is rowing good for weight loss?

Yes. Rowing engages approximately 86% of your muscles and provides a low-impact, high-calorie-burn workout. A 30-minute moderate rowing session can burn 250-350 calories, depending on body weight and intensity.

How does Watta track calories from rowing?

Watta extracts calorie data directly from your Concept2 PM5 screen photo. The PM5 calculates calories from your actual power output (watts), which is more accurate than estimates based on time and body weight alone.

How often should I row for weight loss?

Most guidelines recommend 150-300 minutes of moderate exercise per week. This translates to 3-5 rowing sessions of 30-60 minutes. Watta's streak system helps you stay consistent with your weekly target.

What intensity should I row at for weight loss?

Moderate intensity (Effort Score 30-50) sustained for longer durations burns the most total calories. Watta's Effort Score helps you find the right intensity — hard enough to be effective but sustainable enough to maintain.

Every erg counts.

Photograph your erg screen after the piece and Watta logs it for you.