Your launch monitor already measures what your club did at impact — path, face, attack angle, loft, spin. RangeBook reads all of it, works out which fault is causing the others, and gives you one thing to take to the next session.
No account. No upload. Runs on your device, offline.
Every delivery number on this club sits in a good window — path, face, loft, spin, all fine. Yet it finishes anywhere across a 46-yard span. The 7 and 9 either side of it scatter half that. Nothing you'd catch looking at one shot at a time.
Pick your standard and every benchmark, grading window and priority moves with it. A 7-iron worth 126 yards off a 20 handicap isn't marked against the 176 a Tour player hits — and the tolerance for a "good" number is nearly twice as wide.
Switch levels and every session you've already imported re-grades itself.
One bad shot is noise. Seventy of them plotted together show the shape you actually hit. Every shot is drawn against the target line with a dispersion ellipse per club, so a two-way miss looks nothing like a consistent draw — and RangeBook coaches them differently.
In this real 71-shot session the 5 iron scatters nearly nine times wider than the pitching wedge — 17.7 yards of side deviation against 2.0. That spread is the difference between a swing fault and a club that doesn't fit.
The app picks the fault with the most leverage rather than listing everything wrong at once.
Your next import compares the same metric and reports how much of the gap you actually closed.
Each priority comes with the practice that addresses it, not a generic tip list.
Built and tested against real exports from Square Golf, Garmin R10 and R50, SkyTrak and Rapsodo. Also reads GSPro, Foresight, Bushnell Launch Pro, FlightScope, TrackMan and E6. Columns are matched by meaning rather than by name, and metric files convert automatically. Find your export file.