Rapsodo MLM2PRO vs Voice Caddie Swing Caddie SC4 PRO

How they differ

Both makers say their unit works indoors and outdoors and connects to simulator software. The MLM2PRO lists more metrics, including club path and spin axis, but puts many features behind a Premium Membership. The SC4 PRO lists fewer metrics, a free app and a stated battery life.

How each reads the ball. Rapsodo says the MLM2PRO is “Stacked with two advanced cameras plus Doppler Radar.” The cameras also feed Rapsodo’s Impact Vision and swing replay, which Rapsodo lists as Premium features. Voice Caddie lists a Doppler radar sensor on the K band at 24 GHz for the SC4 PRO.

What each measures. Rapsodo lists 15 metrics and marks eight as measured: angle of attack, club path, ball speed, club speed, launch angle, launch direction, spin rate and spin axis. Rapsodo says “Golf balls with RPT are required to show spin numbers.” Voice Caddie lists eight metrics: carry and total distance, swing speed, ball speed, smash factor, apex, launch angle, launch direction and spin rate. It does not separate measured from calculated values. Spin axis, club path, angle of attack and descent angle are on Rapsodo’s list and not on Voice Caddie’s.

Space. Rapsodo asks for a little more than 14 feet indoors: 8 feet from ball to net and the unit 6.5 to 8.5 feet behind the ball. It adds, “Taller players may need to place the device further back to capture their entire swing video.” Voice Caddie puts the SC4 PRO 5 feet behind the ball, on the same level as the ball, and recommends 10 feet from the ball to a net or screen. How much room you need for a home launch monitor sets these figures out against other launch monitors.

Memberships, as each maker states them.

• Rapsodo. A 45-day Premium Membership trial is included, and Rapsodo charges the card on file when it ends unless you cancel. Premium covers spin rate and spin axis (with RPT balls), club path and angle of attack, Rapsodo Courses, Rapsodo Range, Impact Vision, cloud video and more. Rapsodo does not state the membership price on the MLM2PRO page.
• Voice Caddie. Voice Caddie says the VoiceCaddie S app “is readily accessible and completely free to use.” E6 Connect and Optishot Orion courses are an optional subscription, with five E6 Connect courses and one driving range included. Voice Caddie does not state the E6 Connect subscription price on the SC4 PRO page.

Apps and simulator software. The MLM2PRO app runs on Apple and Android, includes Rapsodo Courses (more than 30,000), Range, Combine, R-Speed and R-Cloud, and connects with GSPro, E6 and Awesome Golf. The VoiceCaddie S app runs on Apple and Android. Voice Caddie lists E6 Connect (iOS and PC) and Optishot Orion compatibility, plus VC Manager for Windows and Mac.

Phone-free use. Voice Caddie says the SC4 PRO works as a standalone unit with no smartphone required, with voice output of distance and a remote control magnetically attached to the back of the unit.

Battery. Voice Caddie lists a 7,500 mAh rechargeable lithium-ion battery and 10 hours, depending on conditions. Rapsodo does not state battery life on the MLM2PRO page.

Who each one suits

• The MLM2PRO suits a golfer building an indoor setup who wants spin and club path marked as measured, will hit RPT balls, and is comfortable paying for Premium after the trial. Rapsodo describes it as “a launch monitor and golf simulator designed for complete visibility into your game.”
• The SC4 PRO suits a golfer who wants core ball data from a free app, the option to use it at the range without a phone, and a stated battery life, and who does not need club path or spin axis. Voice Caddie says it “is a complete simulator and a portable golf launch monitor.”

Either unit gives you ball speed, launch angle and spin rate. Put them into the Launch Window Explorer to see which launch and spin carry farthest for your ball speed. What a home launch monitor can and cannot tell you explains which numbers are worth trusting, Home launch monitors under $1,000 covers more budget options, and all launch monitors we have researched lists the rest. The MLM2PRO also appears in Garmin Approach R10 vs Rapsodo MLM2PRO.