G P S Launch Pro FAQ

Frequently Asked Questions about the G P S Launch Pro phone app


What does the G P S Launch Pro do?

It measures the slope of the ground above or below your feet, and based on your club selection and distance it tells you how far off target you should aim in order to get the ball to land at the target.

How do I use the G P S Launch Pro app?

Hold your phone in front of you as if you were taking a picture either upright or sideways. Tilt your phone to approximate the slope your ball is on, or actually set the edge of the phone on the slope to read the slope measurement (yellow number in the grass) and tap the golf ball. Next, enter your yardage and intended club. The Launch Pro will display how far right or left you should aim to get the ball to your target.

Why are ball flights affected by slopes?

When the clubhead is soled level with the ground at impact, with centered contact every club goes straight. When the ball is above or below your feet and soled level with the slope, the clubface no longer aims at the target. Above your feet will aim to the ‘pull’ or ‘hook’ side, below to the ‘fade’ or ‘slice’ side.

How do I find the G P S Launch Pro app?

You can purchase the app on your phone at the Apple App store or the Google Play store

My wedges seem to ‘pull’ or ‘push’ more with less curvature, and my longer irons seem to start a little straighter and ‘draw' or ‘fade’ more. Why?

The terms for what we’re measuring are ‘directional displacement’. The higher the club, the more displacement there is – a wedge will go farther off line immediately after impact vs. a 5 iron.

What are the directions in the red box?

These are the optional adaptations that the player can make to get the club to sole level with the slope at impact. If it does not sole level with the slope, impact can be easily compromised whether above or below your feet.

My ball doesn’t always go in the direction of the slope. Why?

Simply put, either your clubface did not match the slope at impact, or the grass conditions interfered with the clubface position at impact.

What does it mean to ‘work with the golf course’?

The golf course is not flat! For the most part you want to use the slopes and conditions to your advantage by working with these conditions – don’t try to counteract them. For example, a 7 iron at 150 yards and 6 degrees above your feet should pull or draw at least 30 feet (10 yards). If you were to try to fade the ball you would have to overcome those 10 yards of pull influence just to get it to go straight, much less start to fade. You would have to ‘double’ your effort to fade it in order to get it to start curving to the fade side. That’s working against the golf course. Don’t fight what it’s telling you if you can help it!

How will this app help me to play better golf?

The G P S Launch Pro app will help you understand and predict when and where the ball will pull, push, or curve, and make your approach shots far more effective and closer to the pin. It's not always your failure to make your best golf swing - many times the course itself is causing the ball flight you receive. If you try to hit the ball solid and straight all the time you will fail - predictably. Often it is not your inability to make the same swing. It actually may be that you can, and do, and the way the clubface is presented to the ball does not account for the slope in the current lie.


Why should I change on slopes?

Because if you intend to make your best 'range' swing on a slope of 4 degrees or more, you are hitting the ball with the clubface in the same orientation as if you were on a flat lie hitting a club that was 4 degrees too flat or too upright. You spend a lot of time on your flat lie swing, but how often do you get that same lie on the golf course?

below feet bad lie