Get the app

Fix your swing.
Drop your handicap.

Record one swing on your phone. See how far your head and hips moved and how much forward bend you lost through impact, in inches and degrees. Then fix the one thing that costs you the most.

Google is reviewing the Android app. Join the list and get one email the day you can download it.

Your rounds, card, stats and handicap index are free.

On iPhone, join the list and get one email the day you can download Scratchmaxx.

Measure your swing to the degree.

Set your phone at hip height and record one swing. Face on, you see your head and your hips. Down the line, you see your spine angle. You read every number in inches and degrees, against the line tour players keep.

See your head move.

Read how far your head drifted from its address spot at the top and at impact. Tour pros in our test clips moved it 0.7 to 3.5 in going back.

See your hips shift.

Read how far your hips moved toward the target at impact. Tour pros in our test clips shifted 3.8 to 8.2 in. Under 1.5 in, you hang back.

See the bend you lose.

Read how many degrees of forward bend you kept through impact. Tour pros kept it within 5 degrees. An 18 handicap in our test clips lost 9 degrees.

A golfer's iron swing on video with the swing path traced, the playback bar and the first coaching line
The swing report: a radar of setup, path, sequencing, contact, distance control and finish, then the measured forward bend line

Check your swing against the tour line.

You read these seven checkpoints on every swing. Cross a line and that fault goes on your list with its number, so you know which one to fix first.

Your head at the topFace onwithin 4 in of its address spotA sway
Your trail hip at the topFace onno more than 1 in outside your trail footA hip slide
Your forward bend at the topDown the line8 degrees lost at mostStanding up
Your hips at the impactFace on1.5 to 11 in toward the targetHanging back
Your head at the impactFace on5 in toward the target at mostHead ahead of the ball
Your forward bend at the impactDown the line7 degrees lost at mostEarly extension
Your hips at the finishFace onwithin 7 in of your lead footFalling back

Fix one thing first.

You read every swing in your clip on its own, then you start with the fault that costs you the most and train it with its drill.

Hanging back on your trail foot? Clip the tee.
  1. Push a tee into the turf a hand past the ball.
  2. Hit the ball, then clip the tee.
  3. Finish with your weight on your lead foot.
Learn how to stop hanging back

Ask about your swing, your clubs or your next round, and get answers built on your own swings and rounds.

Your swing fingerprint with path, plane and distance control, the moves to remember, and the first fix with its drill

Play your round with your card.

Tee off with your scorecard: strokes, putts, fairways, greens and bunkers, hole by hole. Stand on each green once, and every round after that you see the distance to its centre from where you stand. Mark each shot and the club you hit.

A finished round card: 81 strokes, 32 putts, 10 of 14 fairways, 7 of 18 greens and 4 bunkers, with the front nine
Pick your course: Oak Hollow Golf Club, Blue tees, par 72, rating 71.8, slope 131, then Tee off

Know your carry with every club.

Mark your shots on the course and read the median carry of every club in your bag, with your longest beside it. Pick your club from the carry you hit most days.

Build your club distance chart
Your bag: the median carry of driver, 3 wood, 5 iron, 7 iron, 9 iron, pitching wedge and sand wedge, each with its best

Track your index. Find your lost strokes.

Add your course once with its pars, stroke indexes, rating and slope. Your index follows the World Handicap System: your best 8 of your last 20 rounds, every hole capped at net double bogey. Then see where your strokes go: fairways, greens, scrambling, putts and your score by par.

Calculate your handicap indexLearn how your index works
Your game: index 6.2, average score 82.2, best 78, fairways hit, greens in regulation, scrambling and putts per round
Your index 6.2 above your last rounds at Oak Hollow, each with its score and how far over par you finished

Read the fix before your next bucket.

Fix early extension in your golf swing: keep your posture

You early extend when your hips push toward the ball and you stand up before impact. See how much bend tour pros keep and three drills to fix it.

Swing faults · 7 min read

Stop hanging back in your golf swing: shift before you turn

You hang back when your hips stay on your trail side at impact. See how far tour pros shift, how to spot a reverse pivot and three drills to fix it.

Swing faults · 7 min read

Stop swaying in your golf swing: how far your head can move

You sway when your head and hips slide away from the target in your backswing. Learn how far your head can move, the 1 inch hip limit and three drills.

Swing faults · 7 min read

Calculate your golf handicap index with the WHS formula

Calculate your golf handicap index by hand: score differentials, net double bogey, the 3 to 20 round table, course handicap and one full worked example.

Handicap · 8 min read

Film your golf swing: set up face on and down the line

Film your golf swing face on and down the line: where your phone goes, how high, how far back, which frame rate, and what each angle shows you.

Practice · 7 min read

Know your golf club distances: chart by club and speed

Use this golf club distance chart: tour carry and club speed for every club, amateur medians by handicap, and steps to measure your own carry.

Clubs and distances · 8 min read

Stop hitting fat golf shots: move your low point forward

You hit fat golf shots when your club bottoms out behind the ball. Find the body move that causes it on video and fix it with three drills.

Ball striking · 7 min read

Handicap index calculator

Enter your scores with each course rating and slope and get your index the World Handicap System way.

Free tool

Course handicap calculator

Turn your index into the strokes you get on today's course, hole by hole, with your net double bogey.

Free tool

Get your answers before you tee off.

What do you measure in a golf swing with Scratchmaxx?
Record a swing face on and you see how far your head moved at the top and at impact, how far your trail hip slid at the top, how far your hips shifted toward the target and where you finished. Record it down the line and you see how much forward bend you kept at the top and through impact. You read every number in inches and degrees.
Do you need a launch monitor or sensors?
No. You need your phone, set still at hip height, and one swing in the frame. Your phone reads your body, so you see how you moved. Ball speed, spin and carry from a single swing stay a launch monitor job.
Is Scratchmaxx free?
Your rounds, your card, your stats and your handicap index are free. Your swing reads need a plan or a scan pack: weekly, yearly with a free first week, lifetime, or packs of 1, 5 or 30 reads.
How do you track your handicap index?
Add your course once with its pars, stroke indexes, course rating and slope from your tee. Your index follows the World Handicap System: the best 8 differentials of your last 20 rounds, every hole capped at net double bogey. It is your own tracking number; an official index comes from your club or association.
How do you get distances to the green?
Stand on each green of your course once. Every round after that, you see the distance to the centre of the green from where you stand.
Can you use Scratchmaxx on iPhone?
Scratchmaxx runs on Android through Google Play. On iPhone, join the list and you get one email the day you can download it.

Start with one swing.

Set your phone at hip height, record one swing and read your first fix.

Google is reviewing the Android app. Join the list and get one email the day you can download it.

Your rounds, card, stats and handicap index are free.

On iPhone, join the list and get one email the day you can download Scratchmaxx.