Built by a golfer who got frustrated

How this started

FlushLab started the way a lot of projects start — with a purchase that created more questions than answers.

FlushLab's founder bought a launch monitor for his home simulator. He was excited — finally going to have real data on his swing. Ball speed, spin rate, launch angle, carry distance, all of it. The kind of numbers that used to require a trip to a tour van.

Then he looked at the data.

Smash factor, spin loft, D-plane, face-to-path, dynamic loft — the raw numbers were there, but making sense of them felt like it required a master's degree in physics. What's a good smash factor for a 7-iron? Why is the driver spin so high? Is 14° of launch angle good or bad at a given swing speed? The stock apps that came with the hardware gave averages and color-coded ranges, but nothing that actually explained the relationships between the numbers.

So he did what any obsessive golfer would do: spent weeks going down the rabbit hole. Published research on coefficient of restitution. TrackMan's D-plane white papers. Titleist's altitude and temperature coefficients. The actual math behind spin loft and why it matters more than backspin alone.

The deeper he went, the more a question kept nagging: why doesn't an app exist that does this?

Not an app that shows you averages. Not one that repeats the same generic tips. An app that takes your actual launch monitor data and runs it through real physics — club-specific smash factor ceilings, D-plane ball flight analysis, spin loft calculations, conditions-adjusted carry, per-club coaching breakdowns with the math behind every recommendation.

He looked. It didn't exist. So he built it.

The problem

Launch monitors have gotten incredibly good. A $600 Garmin R10 gives you data that only tour pros had access to a decade ago. FlightScope, Foresight, Bushnell, TrackMan, Uneekor — the hardware is there. The data is there.

But the apps that analyze that data? Most of them just show you averages. Some add color-coded ranges that don't account for loft-specific physics. Others repeat the same golf myths that have been circulating since before launch monitors existed — like telling you to chase a 1.50 smash factor with your 7-iron (physics won't let you get past ~1.30).

The result is golfers spending thousands on hardware and getting analysis that a spreadsheet could produce. That's the gap FlushLab fills.

The approach

FlushLab starts from first principles. Every number you see traces back to an actual physics formula — coefficient of restitution, the relationship between dynamic loft and spin loft, D-plane ball flight laws with corrected face angle weighting, and altitude and temperature coefficients; all derived from published engineering data.

When FlushLab tells you your smash factor ceiling for a given club, that ceiling is derived from the COR of the club face, the head mass, and the loft angle — not pulled from a generic table. When it tells you your ball should start 2.4° right of target, that's calculated from the ~80–85% face angle contribution to starting direction that D-plane analysis has established.

The Coaching Debrief doesn't give you generic tips. It looks at your actual data — per club — identifies what's working, ranks your work-ons by estimated yards lost, and generates Setup Lab adjustments with the physics reasoning behind each one. You don't just get "move the ball forward." You get why, what outcome to expect, and a checkpoint to verify the change.

FlushLab University

We publish everything we learn. FlushLab University is an open library of deep-dive guides covering ball flight physics, club fitting science, equipment optimization, and launch monitor analysis — written with the same physics-first rigor that powers the app.

The guides aren't marketing content. They're the same research that informed FlushLab's physics engine, published for anyone who wants to understand what their data actually means.