Tempo Rail

Putt

Distance 3.0 m

Green speed (stimp)10

Slope along the puttFlat

Your strength100%

100% gives TempoStik+'s own lengths. If your putts still come up short, raise this; long, lower it. Every distance, green speed and slope scales from it.

Backstroke about 26 cm. Length follows the square root of distance over stimp, scaled by tempo.

Pause between putts3.0 s

Tempo

Core tempo (downswing)90 bpm

The downswing, top to impact: bpm = 30 ÷ seconds. 90 bpm is 0.33 s, the PGA Tour average; 83 is 0.36 s, 100 is 0.30 s.

Rhythm ratio (back : down)2.0 : 1

The backswing takes this many times as long as the downswing. Kenyon recommends 2.0 to 2.1; at 90 bpm and 2.0 the whole stroke is about one second.

Find my tempo

Phil Kenyon's method. Five putts at 10 ft at each of 85, 90 and 95 bpm with the ratio at 2.0. Pick the one that feels most natural, then hold it for five putts each at 15, 20 and 25 ft.

Sound

A continuous tone whose pitch follows the putter's speed: it dips to its lowest at the top of the backswing and peaks exactly at impact.

Tone range

Phone speaker runs 400 Hz to 1.8 kHz, where the iPhone speaker is loudest. Headphones run lower, 110 to 660 Hz, and pan the tone from the backswing side to the follow-through side (right-handed).

Takeaway clickStart the putter back Top clickTick at the end of the backstroke Impact strikeA sharp strike on the impact moment; the tone dips under it Outdoor boostSaturates the sound for more loudness without clipping

Count-in before takeaway2 ticks

Ticks at your backswing rhythm, then the takeaway: tick, tick, go. A ring fills around the ball as the takeaway nears, so you can see it coming too.

Volume80%

Line and sound sync0 ms

The ball flashes where the line meets it while the strike plays every second. Tap + until the sound lands with the flash. Redo it if you switch between the phone speaker and Bluetooth. The setting is saved.

Film your stroke

Film modeFlashes the guide at takeaway, top and impact so each cue shows in slow-motion footage

Film from directly above in Slo-mo with the phone and the putter head both in shot. Play it back and check Kenyon's four points:

Takeaway: does the putter start with the line, not after it?
Backswing: does it track the line, or fall behind and catch up?
Transition: does it stall at the top? Most players do, then rush impact.
Impact: does the putter reach the ball on the impact flash?

Setup

Flip directionUse when the hole is at the other end of the phone

Lay the phone flat beside the ball, along the line of the putt, with the end marked TO HOLE pointing at the hole.
Set the distance, the green's stimp and any slope. Tap Start; the count-in ticks lead you into the first putt.
Take the putter back with the line to the TOP mark, and strike as it reaches the ball on the impact click.
Keep the tempo the same at every distance. Only the length changes.

The guide shows backstrokes up to 45 cm, and switches to a long-putt scale up to 75 cm when needed, so on a phone it's smaller than life; read the TOP mark's centimetres for the real length. No sound? Turn the silent switch off. Settings and presets stay on this phone.