RO! Rowing Metronome

Lock your erg stroke to a drift-free Viking chant—set your pace, hit RO!, and every pull lands on the beat. Now with a session stopwatch and Viking ranks.

RO! turns your rowing machine into a Viking longship. Set your stroke rate, tap the big RO! button, and a drum-and-chant metronome locks you to a steady, drift-free cadence — every pull landing on the beat.

Holding a consistent stroke rate is half of good erg training. RO! makes it effortless (and a little ridiculous): a "dum-dum … RO!" chant on every stroke, a 3-2-1 countdown to get you set, and a screen flash on the beat so you feel the rhythm even mid-sprint.

FEATURES • Drift-free metronome from 18 to 45 strokes per minute • "Dum-dum … RO!" drum + chant on every stroke, with a 3-2-1 countdown • Beat flash so you stay locked in without watching the screen • Session stopwatch — your rowing time and strokes this session • Climb the Viking rank ladder as your lifetime Ro count grows • Stats: today, total sessions, average per session, and your top stroke rate • Works fully offline. Screen stays awake while you row. • No accounts. No ads. No data collected — ever.

RO! PRO — one-time $2.99, no subscription Unlock your full stats history, a war-horn intro, and the option to turn the beat flash off. Buy once, yours forever.

Set the pace. Hit RO!. Row like a Viking.