SCOTTSDALE, Arizona – The Stack System has announced the launch of Practice Tracker, a new feature that allows golfers to measure whether their practice is actually producing improvement.
Practice Tracker is included free with every Stack Radar and requires no additional subscription.
Golfers have never had more ways to measure a single shot. What they have lacked is a simple way to measure development over time. Scores and handicaps are tracked meticulously, but the practice that produces them is rarely measured at all.
Practice Tracker closes that gap by automatically recording every shot a golfer hits and organizing it into performance trends that build session after session.
“Most golfers don’t know if their practice is working,” said Dr. Sasho MacKenzie, co-founder of The Stack System. “They leave the range feeling good or feeling bad, and that feeling becomes the record. Practice Tracker replaces that with objective data. Over weeks and months, it builds a complete history of a golfer’s development—patterns that memory simply cannot hold.”
Practice Tracker records carry distance, ball speed, club speed, and smash factor for every tracked shot. It also introduces Spread, a measure of shot-to-shot variability that quantifies consistency in yards.
Spread describes the range in which approximately 95 percent of a golfer’s shots finish. A player averaging 160 yards with a Spread of ±8 yards can expect most shots to land between 152 and 168 yards. A smaller Spread means a more predictable club—and more reliable decisions on the course.
“Consistency has always been the thing golfers talk about and never measure,” said MacKenzie. “Spread transforms consistency from something golfers feel into something they can measure. Once a player can see it move, they can train it.”
Because Practice Tracker records carry distance and Spread together for every club, golfers also develop a clearer picture of their true distance gapping—not the numbers they hope for, but the numbers they actually produce.
Practice Tracker separates data by both club and intent, using categories such as Stock, Warm-Up, Max, Fade, and Draw. Warm-up swings do not contaminate stock yardages. Maximum-effort speed work stays separate from controlled distance practice.
The result is cleaner trend data and more useful conclusions. A golfer can see how a stock 7-iron has developed across a season while tracking maximum club speed as an entirely separate line of progress.
Practice Tracker was designed around a simple constraint: a measurement system only works if it gets used. Setup takes under 60 seconds. Stack Radar pairs to TheStack App over Bluetooth, a session is started, and every shot is tracked from there.
Stack Radar itself is priced at $289 with no recurring cost, fits in a golf bag, and works indoors or outdoors, with a ball or on dry swings alone. Golfers can adjust for temperature and altitude, so carry numbers reflect the conditions in which they are training rather than a single fixed environment.
Practice Tracker is available to both iOS and Android users through TheStack App.
“Practice Tracker was not designed to compete with launch monitors,” said MacKenzie. “Launch monitors measure shots exceptionally well. Practice Tracker measures improvement. Those are different problems. The reason we could solve the second one is that Stack Radar is inexpensive, portable, and fast enough to use every single time a golfer practices—and because tracking is free, there is nothing standing between a golfer and a permanent record of their development.”
Practice Tracker is available immediately to every Stack Radar owner through TheStack App on iOS and Android. There is no additional subscription, no upgrade tier, and no data limit—golfers pair their device, start a session, and begin building a measured history of their practice.
The feature extends the same principle that has guided The Stack System since its origins in university biomechanics research: that measurable, objective data produces better training decisions than intuition alone. Learn more about how Practice Tracker is The Missing Piece in Modern Golf Practice.
Having recently surpassed 50 million recorded swings on the platform, the company continues to expand the range of golf performance that can be reliably measured outside a laboratory.