What is the best app for indoor rowing?

Watta is designed specifically for indoor rowing. Unlike generic fitness trackers, Watta captures rowing-specific data (split, stroke rate, drag factor) using AI-powered OCR and provides Effort Scores tailored to erg performance.

Does Watta work at any gym?

Yes. Watta works with any Concept2 ergometer with a PM5 monitor, which is the most common rowing machine found in commercial gyms, CrossFit boxes, and boathouses worldwide.

Can I use Watta for both rowing and cross-training?

Watta tracks all three Concept2 machines — RowErg, SkiErg, and BikeErg. If your indoor training includes multiple Concept2 machines, Watta captures it all.

The indoor rowing app that works as hard as you do

By the Watta Team · Updated March 2026

Whether you row at a gym, boathouse, CrossFit box, or home, Watta captures every indoor rowing session with AI-powered photo logging. No Bluetooth, no manual entry — just snap your PM5 screen and train.

Indoor Rowing App: 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

Indoor rowing apps are outdated or overly complex

Existing erg apps rely on Bluetooth pairing, require manual data entry, or bury useful features behind complicated interfaces. Indoor rowers need something fast, simple, and reliable.

Workout data disappears after each session

The PM5 screen shows your results for a few minutes, then resets. Without a quick way to capture this data, most indoor rowing sessions go unrecorded, losing valuable training history.

No community for indoor rowers

Indoor rowing can feel isolated compared to on-water rowing or group fitness classes. Most erg tracking tools are purely functional and lack the social features that build community and accountability.

How Watta Helps

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AI Photo Logging

Take a photo of your PM5 screen after any indoor rowing session. Watta's AI extracts split, distance, stroke rate, time, and intervals instantly. The fastest way to log an erg workout.

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Effort Score

Every session gets a 0-100 Effort Score combining cardiac load, work output, pacing, and economy. Finally, a single metric that captures the full picture of your indoor rowing effort.

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Social Feed

Share your indoor rowing sessions, follow other rowers, and join clubs. Turn solo erg sessions into a connected community experience.

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.