The Data Points Index
Which launch monitor metrics are actually measured, and which are calculated? Far fewer are directly measured than spec sheets imply — and only some manufacturers say which. Rapsodo is the most transparent: of the MLM2PRO's fifteen listed metrics, exactly eight carry a "(measured)" badge on Rapsodo's own spec list — ball speed, club speed, launch angle, launch direction, club path, angle of attack, and (only with marked RPT balls) spin rate and spin axis. The other seven — smash factor, carry distance, total distance, descent angle, apex, side carry, shot type — are listed with no measured badge. SkyTrak publishes a sensor-level split: ball data comes from its photometric cameras, while club data (club head speed, smash factor, club path, face angle) comes from its Doppler radar. Garmin and Voice Caddie publish their metric rosters and sensor type — Doppler radar for the R10, SC4 Pro, and SC300i; internal cameras for the R50 — but no per-metric measured-vs-calculated split at all. The index below records, device by device, exactly what each manufacturer states, with the source for every row. Where a manufacturer doesn't say, the cell says so — nothing here is inferred or guessed.
How to read this index
- "Manufacturer states measured" only contains metrics the manufacturer itself marks as measured (or attributes to a specific sensor). It is not our judgment.
- "Listed without a measurement claim" means the metric appears on the manufacturer's spec list with no statement of how it's produced — typically these are derived by algorithm from the measured inputs, but we only assert what the source says.
- All source pages were fetched and read on August 12, 2026. Where a manufacturer publishes nothing on a question, the cell records that fact rather than an estimate.
Measured vs calculated, by device
| Device | Sensor technology (manufacturer's wording) | Manufacturer states measured | Listed without a measurement claim | Source (fetched Aug 12, 2026) |
|---|---|---|---|---|
| Garmin Approach R10 | Doppler radar — owner's manual: “These features use the internal device radar to take measurements.” | Garmin does not publish a per-metric measured-vs-calculated split for the R10 — cells intentionally left unclassified. | Club head speed, ball speed, spin, launch angle, launch direction, smash factor “and more” (product page); Garmin's golf-science page adds carry distance, total distance, deviation distance, spin rate, spin axis, apex height to its launch-monitor metric roster. | garmin.com product page (010-02356-00) + Approach R10 Owner's Manual (PDF) + garmin.com golf-science ball-metrics page |
| Garmin Approach R50 | Cameras — owner's manual: “These features use internal cameras to record measurements.” | Garmin does not publish a per-metric measured-vs-calculated split for the R50 — cells intentionally left unclassified. | Ball speed, carry/total distance, deviation distance, smash factor, launch angle/direction, spin rate/axis, apex height, club head speed, face angle, angle of attack (15+ metrics per spec sheet), plus environmental readings. | Approach R50 Owner's Manual (PDF) + Garmin spec sheet (as recorded in our data-parameters dataset) |
| Rapsodo MLM2PRO | “Two advanced cameras plus Doppler Radar.” | Ball speed, club speed, launch angle, launch direction, club path, angle of attack — plus spin rate and spin axis “w/ RPT Balls.” All eight carry an explicit “(measured)” badge on Rapsodo's metric list. | Smash factor, carry distance, total distance, descent angle, apex, side carry, shot type — listed by Rapsodo without a “(measured)” badge. | rapsodo.com MLM2PRO product page (metric list with measured badges) |
| Rapsodo Mobile Launch Monitor (MLM1) | “Pairs doppler-radar technology with your iPhone or iPad camera.” | Ball speed, club speed, launch angle, launch direction, smash factor — each marked “Measured” on Rapsodo's metric list. | Distance (shown in-app and on shot tracer) — no measurement-method statement published for it. | rapsodo.com MLM1 product page (metric list with Measured markers) |
| SkyTrak ST+ (SkyTrak+) | “Improved high-speed photometric camera system” + “Dual Doppler Radar for club data measurement.” | Ball data attributed to the photometric cameras: carry distance, total distance, ball speed, back spin, side spin, descent angle, side angle, launch angle, shot shape. Club data attributed to the Doppler radar: “Club Head Speed, Smash Factor, Club Path, and Face Angle.” | Face-to-path (in the club-data spec list; attributed to the same radar system). | skytrakgolf.com ST+ product page (Ball Data / Club Data spec table + technology sections) |
| SkyTrak ST MAX | “Dual Doppler radar technology that captures precise ball and club metrics” + “Photometric Cameras — provide enhanced ball tracking.” Spec-table Technology line: “Photometric Camera.” | Same published split as the ST+: ball data (carry, total, ball speed, back spin, side spin, descent angle, side angle, launch angle, shot shape) under the camera system; club data (club head speed, smash factor, club path, face angle, face-to-path) under the radar system. | SkyTrak does not further classify individual metrics as measured vs derived beyond the camera/radar attribution. | skytrakgolf.com ST MAX product page (spec table) + ST MAX feature page |
| Voice Caddie Swing Caddie SC4 Pro | Doppler radar (spec sheet). | Voice Caddie does not publish a per-metric measured-vs-calculated split — cells intentionally left unclassified. | Carry/total distance, swing speed, ball speed, smash factor, apex (max height), launch angle, launch direction, spin rate (the page's “metrics does the SC4 Pro measure” list). | voicecaddie.com SC4 Pro product page (metrics section + spec sheet) |
| Voice Caddie Swing Caddie SC300i | “Utilizes Doppler radar technology and calibrated atmospheric pressure sensors.” | Voice Caddie does not publish a per-metric measured-vs-calculated split — cells intentionally left unclassified. | Ball speed, swing speed, launch angle, apex, smash factor, spin rate; distance is announced via voice output. | voicecaddie.com SC300i product page (features + metric descriptions) |
What the pattern means for buyers
Two practical takeaways fall straight out of the manufacturers' own language. First, spin is the dividing line: the only device in this index whose maker explicitly claims measured spin is the Rapsodo MLM2PRO, and only with RPT balls — every radar-only unit lists spin rate without saying how it's produced. If spin numbers drive your practice (wedge work, fitting curiosity), that distinction matters more than any accuracy percentage in an ad. Second, club data and ball data can come from different sensors in the same box — SkyTrak attributes ball flight to cameras and club delivery to radar — so "camera vs radar" isn't a clean either/or when you compare spec sheets.
Methodology & honest limits
- Sourcing: every cell comes from a manufacturer product page, spec sheet, or owner's manual fetched on August 12, 2026. No reviewer data, forum lore, or our own testing claims are used — this site does not test devices.
- Omission over inference: where a manufacturer does not classify a metric (Garmin, Voice Caddie), the cell says so. A blank or "not stated" cell is information, not an oversight.
- Naming: Voice Caddie's current SC4-series page documents the SC4 Pro; our budget guide discusses the SC4 family. Rapsodo's entry unit is sold as the MLM1.
- Versioning: v1.0, published August 12, 2026. If a manufacturer changes a spec page, we update the row and increment the version — corrections are dated, not silent.
Cite this data: LaunchMonitorPicks Editorial. “The Data Points Index: Measured vs Calculated Launch Monitor Metrics” (v1.0). LaunchMonitorPicks, August 12, 2026. https://launchmonitorpicks.com/data-points-index — free to cite with attribution (CC BY 4.0). Each table row carries its manufacturer source; please cite the row's source alongside this page when quoting a specific cell.
Frequently Asked Questions
It varies by device, and manufacturers only sometimes say. Rapsodo is the most explicit: the MLM2PRO's own spec list badges exactly eight metrics as measured — ball speed, club speed, launch angle, launch direction, club path, angle of attack, and (with RPT balls) spin rate and spin axis — while smash factor, carry, total distance, descent angle, apex, side carry, and shot type appear without a measured badge. SkyTrak states its ball data comes from photometric cameras and its club data (club head speed, smash factor, club path, face angle) from Doppler radar. Garmin and Voice Caddie publish metric lists and the sensor type (radar for the R10, SC4 Pro, and SC300i; internal cameras for the R50) but do not publish a per-metric measured-vs-calculated split.
Garmin lists spin rate and spin axis among the R10's metrics and states in the owner's manual that the device 'uses the internal device radar to take measurements,' but Garmin does not publish which individual R10 metrics are measured directly versus modeled. That per-metric split is exactly the cell we leave blank in this index rather than guess. What is documented elsewhere in the category: camera-based systems that do measure spin optically (Rapsodo MLM2PRO) require specially marked RPT balls to do it.
Rapsodo's product page states its spin rate and spin axis are measured — but only 'w/ RPT Balls.' The impact camera reads a printed pattern on Rapsodo's RPT (Rapsodo Precision Technology) balls to track the ball's rotation optically; with an unmarked ball there is no pattern to read. That is why 'measured spin' and 'requires RPT balls' always appear together in Rapsodo's own materials.
Yes, and SkyTrak's spec pages are the clearest published example: on the ST+ and ST MAX, ball data (ball speed, launch angle, back spin, side spin, carry) is attributed to the photometric camera system, while club data — club head speed, smash factor, club path, face angle — is attributed to the Doppler radar system. Rapsodo's MLM2PRO badges club speed, club path, and angle of attack as measured via its camera-plus-radar package. Radar-only units like the Garmin R10 and Voice Caddie SC4 Pro track everything with Doppler radar and don't publish a per-metric method split.
Related guides
- The Launch Monitor Accuracy Index — radar vs photometric, normalized
- Garmin Approach R10 full review
- Rapsodo MLM2PRO full review
- Garmin R10 vs Rapsodo MLM2PRO
- SkyTrak ST MAX vs Garmin R10
- Best golf launch monitor under $500
Dataset version 1.0 — published and last updated August 12, 2026.