Rapsodo MLM2PRO vs Voice Caddie Swing Caddie SC4
Side-by-side comparison of specs, features, and pricing
Specs updated
Maintained by GolfSim Compare Team · specs sourced, prices from dated retailer checks · how we compare
Why Rapsodo MLM2PRO is better
- Spin measurement: Measured spin (with marked balls) (Measured spin (with marked balls) vs Estimated spin)
- Measured ball data: 5 of 9 ball metrics measured (vs 3) (5 of 9 vs 3 of 9)
- Measured club data: 3 of 5 club metrics measured (vs 1) (3 of 5 vs 1 of 5)
- Club data access: Club data available (paid) (Subscription required vs Not available)
- GSPro support: GSPro: supported (vendor sub required) (Supported (vendor sub required) vs No)
- Sim software: 2 more sim titles supported (3 titles vs 1 title)
Why Voice Caddie Swing Caddie SC4 is better
- Subscription: No subscription needed for full function (Not required vs Required)
- 3-year cost: $650 cheaper over three years ($550 vs $1,200)
- Battery life: 6 hours longer battery (10 hr vs 4 hr)
- Built-in display: Built-in display (LCD readout vs None)
Specs Comparison
Rapsodo MLM2PRO $600 vs Voice Caddie Swing Caddie SC4 $550
| Specification |  Rapsodo MLM2PRO $600 |  Voice Caddie Swing Caddie SC4 $550 |
|---|---|---|
| Price | ||
| Price | $600 | $550 |
| Measurement | ||
| Tracking technology | Radar + camera fusion | Doppler radar |
| Radar type | Single Doppler | Single Doppler |
| Camera frame rate (fps) | 240 | — |
| Spin measurement | Marked balls only | Estimated |
| Marked balls | Rapsodo RPT balls | Not required |
| Accuracy tier | Game-improvement | Game-improvement |
| Data points per shot | 15 | — |
| Ball data | ||
| Ball speed | Measured | Measured |
| Launch angle | Measured | Measured |
| Launch direction | Measured | Measured |
| Spin rate | Measured (marked ball) | Calculated |
| Spin axis | Measured (marked ball) | Not reported |
| Carry distance | Calculated | Calculated |
| Total distance | Calculated | Calculated |
| Apex height | Calculated | Calculated |
| Descent angle | Calculated | Not reported |
| Offline distance | Calculated | — |
| Club data | ||
| Club speed | Measured | Measured |
| Attack angle | Measured | Not reported |
| Club path | Measured | Not reported |
| Face angle | Not reported | Not reported |
| Face to path | Not reported | Not reported |
| Dynamic loft | Not reported | Not reported |
| Impact location | Not reported | Not reported |
| Smash factor | Calculated | Calculated |
| Club data unlock | Subscription required ($200/yr) | Not available |
| Space & environment | ||
| Environment | Indoor + outdoor | Indoor + outdoor |
| Placement | Behind the ball | Behind the ball |
| Setback (ft) | 6.5 | 5 |
| Min ball flight (ft) | 8 | 10 |
| Min room depth (ft) | 14 | — |
| Lefty / righty | — | No repositioning |
| Installation | None (portable) | None (portable) |
| Sim software | ||
| Simulator capable | ✓ Yes | ✓ Yes |
| GSPro support | Supported (vendor sub required) | No |
| E6 Connect support | Supported (vendor sub required) | Native |
| Awesome Golf support | Supported (vendor sub required) | — |
| FSX Play support | No | No |
| First-party software | Rapsodo Courses (30,000+ simulated courses + 2 virtual ranges, Premium) | E6-bundled; MySwingCaddie app (practice/data only) |
| Sim software | E6 Apex | OptiShot Orion |
| Included sim content | 45-day Premium trial included with purchase. Plugged In Golf (2023-12) recorded an included E6 Connect code unlocking five courses and a short Awesome Golf trial; not shown on the 2026-09-14 official page. | E6 Connect license (iOS & PC) with 1 course + 1 driving range included at no extra cost; full E6 course library requires an optional E6 subscription. E6 compatibility was added by app update a few months after launch. |
| Subscription | ||
| Subscription (per year) | $200/yr | None |
| Works without subscription | Official membership page (2026-09-14): the device works without Premium, but 'speed training, club data and full-course access require premium membership'. Premium gates the 15-metric set (incl. spin rate/axis, club path, angle of attack), Rapsodo Courses, third-party sim access (GSPro/E6/Awesome Golf), Impact Vision, R-Cloud 10K shot library, R-Speed, and Combine. | Complete without any subscription: all metrics on the built-in LCD with voice output, free MySwingCaddie app for shot history and swing video overlays. Only optional spend is expanding the E6 Connect course library (third-party title cost). |
| Subscription trial | 45-day Premium trial ('The free trial of the MLM2PRO Premium Membership is 45 days'; auto-renews unless cancelled via R-Cloud) | — |
| Connectivity & apps | ||
| Apps | iOS, Android | iOS, Android |
| Built-in display | None | LCD readout |
| Screen mirroring | Casting (AirPlay/Chromecast) | — |
| Connectivity | — | Bluetooth |
| Offline mode | — | ✓ Yes |
| Physical & power | ||
| Weight (lb) | — | 1.3 |
| Dimensions (in) | — | 4.9 x 7.6 x 1.1 in (124 x 193 x 29 mm) |
| Battery life (hours) | 4 | 10 |
| Power source | Rechargeable battery | Rechargeable battery |
| Charging port | USB-C | — |
| Alignment | — | Manual target line |
| In the box | MLM2PRO unit, tripod, carrying case, USB-C charging cable, RPT 3-ball sleeve (Titleist Pro V1 or Callaway Chrome Tour), quick start guide, 45-day Premium trial | SC4 launch monitor, remote control, USB cable, user manual, E6 Connect license (iOS & PC) |
Buy the Rapsodo MLM2PRO
Voice Caddie Swing Caddie SC4 availability
Keep shopping
Jump straight to full specs and where to buy either model, or keep exploring related picks.
Rapsodo MLM2PRO Rapsodo
Full specs & prices Voice Caddie Swing Caddie SC4 Voice Caddie
Full specs & prices
More ways to decide
Best Golf Launch Monitors Under $2,000 Ranked picks by use case Best Budget Golf Launch Monitors Ranked picks by use case Rapsodo MLM2PRO vs Garmin Approach R10 Rapsodo vs Garmin Rapsodo MLM2PRO vs Square Golf Launch Monitor Rapsodo vs Square Golf Rapsodo MLM2PRO vs SkyTrak (original) Rapsodo vs SkyTrak
These two track the ball differently: the Rapsodo MLM2PRO is a radar-camera fusion unit, while the Voice Caddie Swing Caddie SC4 is Doppler-radar, per their recorded specs. What that difference means for spin, space, and indoor use is covered in our guide to radar vs camera launch monitors .