Every
SessionErgWattSessionSecondStroke
Matters.
Snap your ERG screen, and Watta does the rest — AI extracts your data, heart rate analysis scores your effort, and your crew sees it all.
Not every 2K
is equal.
The clock doesn't tell the whole story. Every workout gets a 0-100 Effort Score combining four dimensions of how hard you actually worked — not just what the split says.
Cardiac Load makes up 40% of your score — your heart rate is the single biggest factor.
Your heart tells
the real story.
Watta uses your resting and max heart rate to build a personalized intensity picture — not generic percentages. Every workout shows your real cardiovascular effort.
No heart rate monitor? You still get a score from power and pacing — but HR unlocks the full picture.
Intensity
See your average BPM, percentage of max, and HR Reserve at a glance — the numbers that actually define how hard you went.
Personalized Zones
Five training zones calculated from your resting and max heart rate — Recovery, Aerobic, Tempo, Threshold, and Max — each mapped to your physiology.
Aerobic Efficiency
Watts per heartbeat — a single number that tracks how efficiently you convert cardiovascular effort into power on the erg. Rated from Building to Elite.
Snap and upload
your ERG screen
Watta reads and logs your erg workout so you can focus on training.
Snap your screen
Take a photo of your ERG screen display after your workout. Gallery upload works too.
AI extracts the data
Our vision AI reads every metric — time, split, distance, stroke rate, heart rate, calories.
Get your Effort Score
A proprietary 0-100 score tells you exactly how hard you worked, combining cardiac load, output, and pacing.
Built for rowers,
by rowers.
Every feature designed around the way you actually train.
AI-Powered OCR
Snap a photo of any ERG screen or PM5 display. Watta extracts time, distance, split, stroke rate, heart rate, and more — automatically. Handles interval screens, summary screens, and time workouts.
HR Zone Breakdown
See exactly how much time you spent in each heart rate zone — from recovery through max effort — on every workout.
Social Feed
Follow teammates, react to workouts, leave comments. See what your crew is putting down on the erg.
Clubs & Squads
Create or join clubs with invite codes. Organize into squads for internal competition and squad leaderboards.
Strava Sync
Connect Strava to automatically push your erg workouts. Your rowing data, everywhere you want it.
Train together.
Compete together.
Create or join rowing clubs, organize into squads, and see how you stack up on the leaderboard.
Leaderboards
Global, club, and squad leaderboards ranked by effort score, distance, or time.
Invite Codes
Share a code and your squad is in. Simple onboarding for any team size.
Push Notifications
Get notified when teammates post workouts or when your club has news.
Every erg counts.
Download Watta and start turning your erg sessions into data-driven training.
