Tornu Golf - Swing Tempo

Tornu measures your golf swing tempo on your Apple Watch and tells you the truth about it.

Backswing duration. Downswing duration. The ratio between them. And — the part that actually improves your golf — how much all of that varies from swing to swing.

MOST APPS GUESS. THIS ONE MEASURES.

A metronome tells you what tempo to copy. Tornu tells you what yours is, to the millisecond, from the motion of your own wrist. No ball required, no net required, no camera required. Swing in the garage in January and it works exactly the same.

WHAT YOU SEE AFTER EVERY SWING

• Backswing and downswing, in seconds
• Your tempo ratio
• Crest — where in the downswing your hands gained speed fastest
• A live arc on your watch that draws your downswing as it happened

WHAT YOU SEE AFTER A SESSION

• Every number with a ± beside it, per club
• Green when your spread is inside your target, red when it isn't
• Your history, and whether the spread is narrowing
• Every individual swing, kept, so a bad one can be deleted rather than skewing the average

CONSISTENCY IS THE PRODUCT

Anyone can hit one good swing. Tornu is built around the second one, and the fifth. The ± beside every number is the whole point: it says whether that number is really yours or whether you got lucky once. Set the tolerance to Relaxed while you find a baseline, then tighten it as you improve.

OPTIONAL CAMERA, FOR SHARPER TIMING

Prop your iPhone at the mat and Tornu uses the camera to re-time your downswing more precisely, then plays the video back frame-locked to the arc. You watch the club reach the ball at the exact moment the arc completes. The camera refines one number; everything else always comes from the watch.

WHAT TORNU WILL NOT TELL YOU

No clubhead speed. No ball speed. No club path. No face angle.

The watch sits above the wrist joint and never sees the clubface, so those numbers cannot be measured from there — only estimated. Other wrist apps print them anyway. We would rather show you four numbers you can trust than eight you can't.

BUILT FOR THE RANGE

• Start on either device, finish on the other — everything mirrors
• Your bag, with the clubs you actually carry
• The screen stays awake while you're swinging
• Works with a weighted trainer, indoors, all winter

YOUR DATA STAYS YOURS

No account. No login. Your swing measurements never leave your iPhone and Apple Watch — no timing, no tempo, no crest, no sessions. Back it up to a file you keep, or delete everything in two taps.

FREE TO TRY

Your first 50 saved swings are free, with every feature unlocked. No credit card and no clock — take them over a month if you like. After that, Tornu Pro is a monthly or annual subscription, or a single one-time purchase if you would rather not subscribe.

Requires an Apple Watch. iPhone required for setup, review and camera timing.

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