Personal launch monitors: which numbers are real

A launch monitor used to be a fitting-bay machine that cost as much as a car. Consumer units now sit in the price range of a driver, and the useful question has changed from whether you can afford one to whether the numbers it gives you are worth having.

What every unit measures, and what it guesses

Radar units track the ball in flight and calculate the rest. Camera-based units photograph the ball and the club at impact and measure more directly. Either way, some numbers are measured and some are modelled, and the manufacturer rarely draws a bold line between them. Carry distance and ball speed are reliable on almost everything; spin axis, club path and face angle vary considerably by unit and by price.

The three numbers worth caring about

Carry distance tells you what club to hit and is the single most valuable thing an amateur can learn. Ball speed tells you whether a change actually added speed or only felt like it. Launch angle, paired with spin, explains why your drives balloon or run out. Everything else is interesting and almost nobody uses it to improve.

Indoors, outdoors and the honest caveats

Radar units want space behind and in front of the ball, which a garage does not have; camera units work in a confined bay but want good lighting and a marked ball. Numbers from a mat differ from numbers off turf, and a heated indoor bay in January is not the same air as a course in July. Use the device to compare, not to publish absolute distances.

Where they genuinely help

Three uses justify the purchase. Building a carry chart for every club, which almost no amateur has. Testing whether a swing change did anything measurable, rather than trusting how it felt. And winter practice with feedback, which is the difference between maintaining and drifting.

Where they do not

A launch monitor will not tell you why your club path is out to in, and chasing club-path numbers without a coach is how golfers spend a winter building a compensation. It also will not fix short game, course management or putting, which is where most amateur strokes actually go.

What to look at before buying

Decide whether you will use it indoors, outdoors, or both, because that narrows the field faster than anything else. Check what is measured rather than calculated at your price point. Look at whether the software requires a subscription, which is a recurring cost the sticker price does not show. And try one first: PGA Tour Superstore and Golf Galaxy have units in store, and many indoor facilities rent bay time by the hour with a monitor included.

Panxis Golf has no commercial link with any manufacturer or retailer and earns no commission.

Before you spend

• Rent bay time for an hour and build a carry chart. If that is all you wanted, you may not need to own one.
• Confirm which numbers your intended unit measures rather than models.
• Check for a subscription before you compare prices.

The device is a measuring instrument, not a coach. Used to answer a specific question it is excellent value, and used as entertainment it is an expensive way to hit balls into a net.