Comparison

Watta vs FDI.me

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

Head to head
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

Free. Photograph your Concept2 PM5, PM4 or PM3 after a piece and Watta logs the whole workout: no typing, no cables. Every session is scored 0–100 and kept in your training log, and can go straight to Strava. 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. STRAVA Connect Strava and turn on auto-sync, and every workout you log in Watta is posted there too. 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.

About

FDI.me

Features
Read full description

FDI.me is an intelligent platform for athletes of all levels: from beginners to professionals. Sync data from any sensor, join tournaments, and track your progress with high precision. Universal Sensor Compatibility - Works with any BLE/ANT+ devices: wrist and chest heart rate monitors, plus smartwatches from various manufacturers - Even with a basic fitness band, our algorithms calculate key performance metrics - Automatic sync of heart rate, pace, intensity, and other parameters - Support for simultaneous use of multiple devices (HR monitor + smart jump rope + fitness ring, etc.) Athlete Passport - Unified digital profile with your complete training history and achievements - Personal metrics: Vo2Max, HRV, Heart Load, recovery quality, and more - Progress trends visualized in clear charts and diagrams - Personalized recommendations for minimum daily activity based on athlete parameters - Option to track and log various non-sporting parameters and their history Smart Training Planning - Personalized workout plans with timing, reps, and weight prescriptions - Customizable heart rate zones and intensity targets aligned to your goals - Adaptive recommendations + AI-powered workout quality scoring - Pre-built workout templates with flexible plan examples (by HR zones, intensity, or rep counts) Deep Performance Analytics - Detailed analysis of each session with heart rate heatmaps and reaction tracking to specific exercise types - Unique Heart Load metric with rest recommendations for extreme values - Automatic tonnage calculation at the end of each workout - Session quality scoring based on HR, load, recovery, and key metrics - Detailed reports with graphs, trends, and period-over-period comparisons Compete in Tournaments - Connect to any club using the FDI ecosystem to join championships and tournaments - Track your results and compare performance with other connected participants - View tournament tables, group results, and semi-finals organized by FDI-system clubs - Challenge friends, earn points, and climb the leaderboards - Share workout results, save and share your workout templates, and get feedback from ecosystem members Why Choose FDI.me? Accuracy: Proprietary algorithms compensate for limitations of basic sensors Flexibility: Customize interface, HR zones, and workout types your way Universality: Works with any hardware - from Garmin watches to budget bands which supports heart rate transmission. Community: Clubs, tournaments, rankings - train as part of a team Progress: See results in numbers, graphs, and real-world achievements Who Is This App For? Runners & triathletes - HR control, intensity zones, recovery tracking Cyclists - tonnage logging, power, cadence, cycling-optimized UI skins Strength athletes - rep/weight plans, rest timers, session tonnage tracking Wellness enthusiasts - daily minimum activity goals and habit tracking Club athletes - rankings, official tournaments, verified statistics Privacy & Data Security - All data stored locally and never shared externally - No transfer of personal information to third parties without explicit consent Download FDI.me today - turn your workouts into a system, and your progress into results! This app is not a medical device. Please consult a healthcare professional before starting any new training program.

Screenshots

Watta4 screens
FDI.me4 screens

Verdict

The call

The clearest difference is update cadence: Watta at every 2 weeks against FDI.me's every 3 months. FDI.me's advantage is device support (4 vs 2). On price, ads, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Watta ships an update every 2 weeks, FDI.me every 3 months. The most recent releases landed on November 9, 2026 and November 10, 2026 respectively.

Scorecard2 real differences · 7 level
Watta versus FDI.me: the parameters behind the verdict, then further details
ParameterWattaFDI.me
PriceFreeFree
Rating5.0 (2 ratings) — better—
Number of ratings2 — better—
Update frequencyEvery 2 weeks — betterEvery 3 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPodiPhone, iPad, iPod, Apple Watch — better
Requires iOS15.1 — better15.6
Further details — not scored
Size38 MB50 MB
Age rating4+4+
DeveloperSTEPHEN CHRISTOPHER MILTONDmitrii Minin

In-app purchases

None

Watta

No in-app purchases

None

FDI.me

No in-app purchases

Questions

Is Watta free?
Watta is free to download, with no in-app purchases.
Is FDI.me free?
FDI.me is free to download, with no in-app purchases.
Do Watta or FDI.me have ads?
Neither Watta nor FDI.me shows ads.
Which is updated more often, Watta or FDI.me?
Watta ships an update every 2 weeks, and FDI.me every 3 months. Most recently, Watta was updated on November 9, 2026 and FDI.me on November 10, 2026.

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