Scull Fit connects to your Concept2 rower over Bluetooth and turns raw PM5 telemetry into a stunning, glanceable dashboard. Pace, power, stroke rate, heart rate — and real-time zone coaching that actually feels good to look at.
Live from the PM5 — sampled every stroke
Prop your phone on the monorail and Scull Fit explodes into an 8-panel cockpit. Every stat you care about — remaining distance, split, pace, stroke rate, watts, heart rate — sized for the gym, not your inbox.
Set a target pace and Scull Fit recolors your entire dashboard in real time. You'll feel the zone before you read it.
Scull Fit rates five dimensions of technique live, stroke by stroke. Level up as your form sharpens — then see it all on a 5-axis spider chart when you finish.
Watts per stroke. The harder each drive works for you, the higher you climb.
Drive-to-recovery ratio. 1.5-2.0 is the sweet spot between powerful and patient.
Average ÷ peak force. Stay connected to the flywheel — no spikey catches.
Coefficient of variation on stroke rate. Steady is strong — tighter is better.
Watts per heartbeat. Your cardio efficiency, one stroke at a time.
Hysteresis-smoothed so the levels never jitter — only real gains change the score.
Drive time, recovery time, distance-per-stroke, peak force, average force, work per stroke, drag factor — all pulled live from the PM5 over native CSAFE. Every stroke's force curve is rebuilt from the rower itself and drawn on screen before your hands return to the catch.
Tap a tile and row. Scull Fit preloads the classic Concept2 distances, remembers your personal bests, and lets you spin up intervals, free rows, or custom sets in two taps.
Direct CSAFE over Bluetooth Smart. No dongles, no cloud round-trips, no lag.
OAuth into your C2 Logbook — rows pull down, new sessions upload back. No copy-paste.
Pair any BLE heart rate strap. HR sits alongside pace and watts, not in a separate app.
Uniform sets, variable ladders, fixed or open rest. Builder compiles straight to PM5 commands.
A 5-axis chart that plots your finish against your own benchmarks — so progress is obvious.
Customizable tile layout, phase-based cues at 50% and 80%, and yellow large-type prompts so race day feels like practice.
Download Scull Fit, pair your PM5, and row like the data is finally on your side.
Requires iPhone with iOS 17+ and a Concept2 PM5.
Yes — any Concept2 rower with a PM5 monitor running Bluetooth Smart. Model D, E, RowErg, BikeErg and SkiErg are all supported.
No. The live workout experience runs entirely on device over Bluetooth. Logbook sync is optional.
Yep — any standard Bluetooth Smart heart rate monitor works. HR appears as a first-class tile on the dashboard.
Yes. Sign in with your Concept2 account over OAuth and your Logbook history pulls down. New rows upload back automatically with pace, stroke rate, drag factor and heart rate attached.
Efficiency (watts per stroke), Rhythm (drive:recovery ratio), Connection (force curve shape), Metronome (stroke-rate consistency) and Engine (watts per heartbeat). All five update live and settle onto a spider chart when you finish.
In development. The Concept2 protocol is the same, and we're building the Android client in parallel.