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9 Best Golf Launch Monitors for Personal Use (November 2026)

Updated on · By the Swinging Axe team

The best golf launch monitors for personal practice include the Garmin Approach R10 for all-round home practice, the Rapsodo MLM for video swing analysis, and the PRGR HS 130-A for speed training without a ball.

On this page (5 sections)
  1. The best golf launch monitors for personal practice
  2. How these golf launch monitors compare
  3. How we compared these personal launch monitors
  4. What should you check before buying a launch monitor for personal use?
  5. Verdict: which personal launch monitor should you buy?

The best golf launch monitor for personal use for most players is the Garmin Approach R10, because it tracks more than a dozen metrics, records swing video with the data attached and runs up to 10 hours on a charge. Pick the Rapsodo MLM if you learn from video replays, the PRGR HS 130-A if you want speed training with no app, or the Garmin Approach R50 if you want virtual rounds on a built-in screen.

This roundup covers units you can set up at home, in a garage or at the range without a commercial bay. Each pick earns its place on data quality, how easy it is to carry and what it needs to run.

Our score weighs specs, features and buyer feedback against what you're shopping for.

If cost is the deciding factor, our budget launch monitor roundup narrows the list to cheaper units. If you're building a bay, the launch monitor for home simulator guide covers screen and software choices.

And for range sessions, the portable launch monitor picks focus on what fits in a bag.

Our picks at a glance

  1. 1 Garmin Approach R10
    Best for all-round home practice

    Garmin Approach R10

    9.2/10 our score

    See it on Amazon
  2. 2 Rapsodo MLM
    Best for video swing analysis

    Rapsodo MLM

    8.8/10 our score

    See it on Amazon
  3. 3 PRGR HS 130-A
    Best for speed training without a ball

    PRGR HS 130-A

    8.7/10 our score

    See it on Amazon
  1. 4Garmin Approach R50

    Garmin Approach R50

    Best for playing virtual rounds at home
    Check it
  2. 5Voice Caddie SC200 Plus

    Voice Caddie SC200 Plus

    Best for instant audio feedback on the range
    Check it
  3. 6Voice Caddie SC4 Pro

    Voice Caddie SC4 Pro

    Best for a free simulator starter setup
    Check it
  4. 7SkyTrak ST MAX

    SkyTrak ST MAX

    Best for detailed swing path data
    Check it
  5. 8TheStack Radar

    TheStack Radar

    Best for speed training with TheStack app
    Check it
  6. 9Uneekor Eye Mini Core

    Uneekor Eye Mini Core

    Best for third-party simulator software
    Check it

The best golf launch monitors for personal practice

The Garmin Approach R10 is the strongest all-round choice for most home setups. The rest of the list fills specific gaps: video replay, no-app simplicity, virtual courses, detailed path data and third-party simulator support.

1

Garmin Approach R10: Best for all-round home practice

Garmin Approach R10, golf launch monitors for personal practice
9.2/10Our score
  • More than a dozen metrics with the Garmin Golf app
  • Automatic swing video clips with metrics
  • Up to 10 hours of battery life
  • Phone mount attaches to a golf bag

A portable radar unit that pairs with the Garmin Golf app for shot data, dispersion charts and swing video. The 10-hour battery covers several range trips between charges.

See it on Amazon

Pros

  • More than a dozen tracked metrics
  • Automatic video clips with swing data
  • Up to 10 hours of battery life
  • Phone mount for bag mounting

Cons

  • Needs a phone and the Garmin Golf app
  • Virtual courses require an active subscription

The R10 suits a player who wants one unit for the range, the garage and the backyard net. Paired with the Garmin Golf app on a compatible phone, it tracks more than a dozen metrics, including club head speed, ball speed, swing tempo, spin and launch angle.

Garmin lists accuracy of plus or minus 3 mph on club head speed and 1 mph on ball speed.

Training mode keeps stats for each club and draws a shot dispersion chart based on estimated ball flight. The automatic video clips are the standout: each swing records with its metrics laid over the footage, so you can match a number to what your body did.

The phone mount attaches to a golf bag, which keeps the screen in view between shots.

Battery life runs up to 10 hours, enough for several sessions before a charge. The unit is IPX7 rated and weighs 340 g, so rain on the range isn't a deal breaker.

It measures 1 inch long by 5.22 inches wide by 2.8 inches high, which keeps it low against the turf where the radar sits. Virtual rounds on more than 42,000 courses need an active subscription.

The trade-off is that the R10 relies on your phone for everything, while the R50 below puts a screen on the unit itself.

Garmin Approach R10Check it on Amazon
2

Rapsodo MLM: Best for video swing analysis

Rapsodo MLM, golf launch monitors for personal practice
8.8/10Our score
  • Shot tracer video replay
  • GPS satellite view of shot dispersion
  • Carry distance, ball speed and club speed
  • Works with iPhone and iPad

The MLM uses your iPhone or iPad camera with radar to show ball flight and shot data. Video replay with a tracer makes swing faults easier to spot.

See it on Amazon

Pros

  • Video replay with an active shot tracer
  • GPS satellite view of dispersion
  • Compact and easy to pack

Cons

  • iOS only, no Android support
  • Simulator courses need a premium subscription

The Rapsodo MLM is the pick for a player who fixes swing faults by watching them back. It pairs radar tracking with your iPhone or iPad camera, then shows each shot as a video replay with an active shot tracer that follows the true ball flight.

That combination is more useful for a visual learner than a column of numbers.

On every shot you get ball speed, club speed, launch angle, carry distance and shot shape. A GPS satellite view maps shot dispersion so you can see your pattern across a session.

Setup takes seconds, and the 0.4 kg unit is light enough to live in your bag. The kit includes a carrying case and charging cord.

The limits start with the platform: the MLM runs on iOS only, so an Android household needs a different unit. It also leans on the phone camera for its best feature, so the phone's view of the ball has to stay clear and steady.

Simulator courses and game modes sit behind a premium subscription. If video is not your learning style, the R10 offers more raw metrics for similar money.

3

PRGR HS 130-A: Best for speed training without a ball

PRGR HS 130-A, golf launch monitors for personal practice
8.7/10Our score
  • Doppler radar for club and ball speed
  • Measures club head speed without a ball
  • Stores 500 past swings
  • Runs on AAA batteries

A pocket-sized radar that reads club head speed, ball speed, smash factor and distance without an app. It also measures swing speed with no ball at all, which suits speed training.

See it on Amazon

Pros

  • Works without Wi-Fi, Bluetooth or an app
  • Measures club speed without a ball
  • Keeps 500 swings in memory
  • Fits in a golf bag

Cons

  • Fewer metrics than camera-based units
  • No shot video or simulator courses

The PRGR HS 130-A is the simplest unit here and the best fit for speed training. It uses Doppler radar to track club head speed, ball speed, smash factor, and total and carry distance.

The key feature is that it measures club head speed without a ball, so you can swing in the garage or gym and still get a number.

No Wi-Fi, Bluetooth or app is needed. Turn it on, place it, and hit.

It runs on AAA batteries and keeps 500 past swings in memory, which suits a speed program where you want a before and after across weeks. PRGR says three-time major champion Padraig Harrington uses it for swing speed training sessions.

The measuring range runs from 135 to 270 yards, and the body is IP54 water resistant.

It's also small enough to slip into a bag pocket at 3.03 by 1.69 by 5.63 inches. The trade-off is depth of data: there's no shot video, no dispersion chart and no virtual course.

The PRGR also reports fewer numbers on club path or face angle than the camera units. For a player chasing club speed rather than shot shape, that simplicity is the point.

For full shot analysis, the R10 or MLM fits better.

PRGR HS 130-ACheck it on Amazon
4

Garmin Approach R50: Best for playing virtual rounds at home

Garmin Approach R50, golf launch monitors for personal practice
8.4/10Our score
  • 10-inch built-in color touchscreen
  • Three-camera system for precision metrics
  • Up to 43,000 virtual courses with a membership
  • HDMI output for a monitor or projector

A premium launch monitor with its own 10-inch touchscreen, so you can review data and play virtual rounds without a phone. HDMI output sends the picture to a monitor or projector.

See it on Amazon

Pros

  • Built-in 10-inch color touchscreen
  • Three-camera tracking system
  • HDMI output for larger displays
  • Carrying case included

Cons

  • 4-hour battery is short for long range sessions
  • Virtual courses need an active Garmin Golf membership

The Garmin Approach R50 suits a player who wants a simulator bay without a phone in the middle of it. A 10-inch built-in color touchscreen shows insights, courses, impact videos and virtual rounds directly on the unit.

A three-camera system measures ball speed, launch angle, face-to-path (with the included tracking sticker) and spin rate and axis indoors or outside.

The built-in barometer adjusts carry distances for atmospheric pressure at your location. High-speed impact videos give immediate visual feedback on strike.

HDMI output sends the picture to a monitor or projector for a larger sim setup. Home Tee Hero offers more than 43,000 courses with putting for up to four players, and third-party simulators are supported too.

An active Garmin Golf membership is required for virtual rounds.

The trade-off is battery life: up to 4 hours is the shortest here. It also weighs 9 pounds and takes up 10.6 by 7.5 by 16.5 inches, so it's a bench unit rather than a bag item.

A carrying case is included for trips to the range, and the whole unit runs on a touchscreen with Bluetooth and Wi-Fi on board. Choose it when the screen and virtual rounds matter more than portability.

The R10 covers core practice for far less.

Garmin Approach R50Check it on Amazon
5

Voice Caddie SC200 Plus: Best for instant audio feedback on the range

Voice Caddie SC200 Plus, golf launch monitors for personal practice
8.2/10Our score
  • Doppler radar with atmospheric pressure sensors
  • Voice output plus LCD display
  • Swing speed mode without a ball
  • Up to 20 hours of battery life

The SC200 Plus calls out shot data and shows it on an LCD, so you can practice without looking at a phone. Its 20-hour battery is the longest in this group.

See it on Amazon

Pros

  • Voice output reads data aloud
  • Up to 20 hours of battery life
  • Swing speed mode works without a ball
  • Adjustable loft angle settings

Cons

  • Basic metric set next to camera units
  • No swing video

The Voice Caddie SC200 Plus is the range companion for a player who would rather hear the numbers than read them. Doppler radar feeds an LCD display and voice output, so each shot is called out without you breaking stance to look at a phone.

Atmospheric pressure sensors help keep readings consistent across weather and altitude.

It also has a swing speed mode that works without a ball, so you can train tempo in the living room. Adjustable loft angles let you match the unit to different club conditions.

Shot data and club stats are stored so you can pull up your average distances per club later. Battery life runs up to 20 hours, the longest in this roundup, and the unit weighs 8 ounces.

The metric set is more basic than the camera units: you get speed and distance style data rather than path and face detail. It's the pick for audio-first practice and long battery life, not for deep swing analysis.

Consider whether you want a screen in your hand or a voice in your ear; the SC4 Pro below adds both a screen and simulator courses.

Voice Caddie SC200 PlusCheck it on Amazon
6

Voice Caddie SC4 Pro: Best for a free simulator starter setup

Voice Caddie SC4 Pro, golf launch monitors for personal practice
8.1/10Our score
  • Built-in screen with voice output
  • 3D driving range and five free E6 courses
  • Prometrics engine for ball and club data
  • Works with standard golf balls

The SC4 Pro pairs a built-in screen with five free E6 Connect courses and a 3D driving range. Standard golf balls work indoors or out, so you don't need marked balls.

See it on Amazon

Pros

  • Five free E6 courses with no monthly fee
  • Works with standard golf balls
  • Built-in screen and voice output
  • Speed training mode

Cons

  • Advanced stats need the Voice Caddie app
  • Premium simulator content costs extra

The Voice Caddie SC4 Pro is the cheapest way into a simulator setup here. It includes a 3D driving range and five free E6 Connect courses with no monthly subscription, so you can play virtual golf right after setup.

A built-in screen and voice output handle feedback without your phone.

The Prometrics engine tracks ball and club data from swing to impact to ball flight. It works with standard golf balls indoors or outdoors, so no marked balls are needed.

Practice, target and speed training modes cover most personal sessions. The Voice Caddie S app adds statistical analysis, distance calibration and swing speed radar when you want more depth.

The package includes a remote, USB cable and manual, and the unit weighs 590 g and measures 1.92 by 7.59 by 1.14 inches.

The trade-off is the software split: the free E6 courses are a starter package, and premium simulator content costs extra. Advanced stats need the app.

Pick it if you want virtual golf on a budget; pick the R50 if you want the screen built into the monitor and a much bigger course library.

Voice Caddie SC4 ProCheck it on Amazon
7

SkyTrak ST MAX: Best for detailed swing path data

SkyTrak ST MAX, golf launch monitors for personal practice
8.0/10Our score
  • Club path, face angle and face-to-path data
  • One year of Core Foresight software included
  • Speed training drills from GOLFTEC
  • Dual USB-C ports for charge and data

The ST MAX tracks club path, face angle and face-to-path along with ball data, so you can see why a shot curved. A year of Core Foresight software is included.

See it on Amazon

Pros

  • Club path and face-to-path metrics
  • One year of Core Foresight software included
  • GOLFTEC speed training drills
  • Dual USB-C ports

Cons

  • Needs a phone or PC to view data
  • Premium software costs extra after the first year

The SkyTrak ST MAX is for the player who wants to know why the ball curved. It measures carry, total distance, ball speed, spin, launch angle, club head speed, smash factor, club path, face angle and face-to-path.

That set covers the whole shot picture, not just how far it went.

One year of Core Foresight software is included at no extra cost. Built-in game improvement tools include skills assessments, bag mapping, randomized practice and a wedge matrix for dialing in distances.

GOLFTEC speed training drills are exclusive to the ST MAX. Dual USB-C ports let you charge and transfer data at the same time, and a redesigned modular interior is built for long-term calibration stability.

It weighs 5 lb.

The trade-off is that it needs a phone or PC to show anything, and premium software costs extra after the first year. It's a photometric camera unit, so it reads impact and early flight rather than full ball flight.

Software support is the other question to settle before you buy: Core Foresight covers practice and bag mapping, while premium tiers open more of the simulator side. Choose it for path and face detail and a deep practice toolbox; choose the R10 for a simpler, cheaper all-rounder.

SkyTrak ST MAXCheck it on Amazon
8

TheStack Radar: Best for speed training with TheStack app

TheStack Radar, golf launch monitors for personal practice
7.9/10Our score
  • Measures swing speed and ball speed
  • Bluetooth link to TheStack app
  • Estimated carry distance and smash factor
  • One month of Stack Wedge Mode included

A small radar built to feed speed and wedge training data into TheStack app over Bluetooth. The wedging features are iOS only, while speed training runs on both platforms.

See it on Amazon

Pros

  • Pairs with TheStack app over Bluetooth
  • Measures swing speed and ball speed
  • One month of Stack Wedge Mode included
  • Light and easy to carry

Cons

  • Wedging features are iOS only
  • Needs the TheStack app for full use

TheStack Radar is a specialist: it feeds speed and wedge training data into TheStack app over Bluetooth. It measures swing speed and ball speed and calculates estimated carry distance and smash factor.

If you already train with TheStack system, this is the unit that logs your numbers automatically.

TheStack app for speed training runs on iOS and Android. Stack Wedging, which builds gamified wedge practice sessions, is iOS only.

A one-month trial to Stack Wedge Mode and bundled access to Stack Putting are included. The unit weighs just 0.12 kg and slips into a pocket.

The Stack System says 2022 US Open champion Matt Fitzpatrick uses it for speed training and range practice.

The trade-off is narrow focus. It doesn't replace a full shot-analysis unit, and wedging features need an Apple device with iOS 15.0 or later.

The putting app is iOS only too, so an Android user gets speed training and nothing else. Pick it if speed training is your main goal and you're in TheStack ecosystem.

For general practice data, the PRGR HS 130-A is simpler and works without an app.

TheStack RadarCheck it on Amazon
9

Uneekor Eye Mini Core: Best for third-party simulator software

Uneekor Eye Mini Core, golf launch monitors for personal practice
7.7/10Our score
  • Dimple Optix reads any ball without stickers
  • 15 ball data points
  • Works with GSPro, TGC19 and E6
  • Three-month trial of the Ultimate Package

A camera-based unit for players building a simulator around third-party software. It reads any dimpled ball without stickers and includes 15 ball data points.

See it on Amazon

Pros

  • No ball stickers needed
  • 15 ball data points
  • Works with popular simulator software
  • Three-month Ultimate Package trial

Cons

  • Needs a capable gaming PC
  • Software subscriptions cost extra

The Uneekor Eye Mini Core suits a player building a home simulator around third-party software. Dimple Optix uses high-speed cameras and infrared sensors to read any dimple pattern, so no ball stickers are needed and you can use any golf ball you like.

It reports 15 ball data points and near-zero latency for real-time feedback.

VIEW software is included for session reports and progress tracking. Club Optix shows real-time visuals of your club at impact, and that view opens with a software upgrade.

Pair it with Swing Optix (sold separately) for AI Trainer feedback. A three-month trial of the Ultimate Package adds 4K championship courses with GameDay competitive modes.

The unit works with GSPro, E6 Connect, TGC19 and Creative Golf 3D, each with its own subscription. The box includes a CAT6 Ethernet cable and club sticker sheets, and the unit carries a two-year warranty.

The catch is the PC requirement: VIEW needs an i5 12th-gen or Ryzen 5 class machine with 16 GB RAM and an RTX 3060, and simulation needs an i7 class machine with 32 GB RAM and an RTX 4070. It also needs a wired Ethernet connection at 25 Mbps, so Wi-Fi alone will not do.

This is the most demanding pick here. Choose it when you already have a gaming PC and want software flexibility.

Uneekor Eye Mini CoreCheck it on Amazon

How these golf launch monitors compare

The table below puts the data source, display and battery or software requirements side by side. Use the golf launch monitor comparison chart for the full spec grid across the site's picks.

ProductBest forData sourceDisplayBatteryOur score
Garmin Approach R10all-round home practiceRadar with app pairingSmartphone appUp to 10 hours9.2
Rapsodo MLMvideo swing analysisRadar plus phone cameraiPhone or iPad app8.8
PRGR HS 130-Aspeed training without a ballDoppler radarBuilt-in LCD8.7
Garmin Approach R50playing virtual rounds at homeThree-camera system10-inch built-in touchscreenUp to 4 hours8.4
Voice Caddie SC200 Plusinstant audio feedback on the rangeDoppler radarLCD with voice outputUp to 20 hours8.2
Voice Caddie SC4 Proa free simulator starter setupPrometrics radar engineBuilt-in screen8.1
SkyTrak ST MAXdetailed swing path dataPhotometric cameraApp on phone or PC8.0
TheStack Radarspeed training with TheStack appRadarTheStack app7.9
Uneekor Eye Mini Corethird-party simulator softwareHigh-speed cameras and infraredPC software7.7

How we compared these personal launch monitors

We compared specs and features against what a home or range player actually needs: tracked metrics, display method, battery life, portability and what software costs after purchase. We did not hit balls on these units.

Our score weighs specs, features and buyer feedback against what you're shopping for.

The ranking puts the Garmin Approach R10 first because it balances metric depth, video feedback and battery life at a personal-use level. Specialist units score lower overall but win on the one job they do.

The PRGR HS 130-A, for example, gives up shot video and courses but nails no-app speed training. The Uneekor Eye Mini Core lands last overall because it needs a gaming PC and paid software, yet it's the right buy for a third-party simulator build.

What should you check before buying a launch monitor for personal use?

Start with the space you'll practice in and the data you'll act on. Every unit here works, but they fail in different rooms and for different practice habits.

Radar or camera: which fits your practice space?

Radar units like the Garmin Approach R10, PRGR HS 130-A and Voice Caddie models need room behind the ball and a stretch of ball flight. Camera units like the SkyTrak ST MAX and Uneekor Eye Mini Core sit close to the ball and read impact.

For a garage net with limited depth, a camera unit is the safer fit. For a range bay or a long indoor run-up, radar works well and often costs less.

There is a power angle too. The PRGR runs on AAA batteries, the Garmin units and the SC200 Plus and SC4 Pro have their own batteries, and the camera units attach to a PC setup for the most part.

A unit that needs a wall socket ties your practice spot to an outlet.

Do you need a phone, or a built-in screen?

The R10, Rapsodo MLM and SkyTrak ST MAX rely on a phone or PC for their display. The Garmin Approach R50 and Voice Caddie SC4 Pro and SC200 Plus show data on the unit or speak it aloud.

If you practice without your phone nearby, or you want to keep your hands free between shots, a built-in screen or voice output is worth paying for.

Which metrics will you actually use?

For most personal practice, ball speed, club speed, launch angle and carry distance are the core four. Spin rate and axis matter for shot shaping.

Club path and face angle matter for fixing a curve. Decide which numbers you'll act on before paying for more.

The SkyTrak ST MAX covers the deepest set here; the PRGR HS 130-A covers the basics without an app.

What do virtual courses and software add to the cost?

Simulator content changes the running cost. The Garmin units need an active Garmin Golf membership for virtual rounds.

Rapsodo premium opens up courses and game modes. SkyTrak's Core Foresight year is included, then renews at a cost.

Voice Caddie SC4 Pro includes five free E6 courses with no monthly fee. The Uneekor Eye Mini Core adds a three-month trial that then converts to a paid plan.

Add up the software you'll want before comparing hardware prices.

How much space do you really need?

Plan for about 8 to 10 feet from the ball to the net. Add 6 to 7 feet behind the ball for radar units.

Camera units sit closer to the ball and need less depth behind it. Measure the room's height too, since a full swing needs clearance.

A launch monitor that reads perfectly in a short bay is more useful than a better unit you can't swing in front of.

Does the brand of your phone decide your shortlist?

For some units it does, and that's an easy thing to overlook until setup day. The Rapsodo MLM is iOS only, so an Android phone rules it out entirely.

TheStack Radar runs speed training on both iOS and Android, but its wedging features need iOS 15.0 or later.

The Garmin R10 and R50 work with the Garmin Golf app on a compatible smartphone, and the PRGR HS 130-A skips the phone question altogether because it has no app at all. If your household mixes phone brands, the app-free units are the safe pick.

Do you want the unit to grow into a simulator build?

Simulator software support is the one spec that turns a practice tool into a winter hobby. The Voice Caddie SC4 Pro gives you five E6 courses up front.

The Uneekor Eye Mini Core is built for GSPro, TGC19, E6 Connect and Creative Golf 3D, each with its own subscription. The Garmin R50 plays Home Tee Hero courses on its own screen and works with third-party simulators too.

Verdict: which personal launch monitor should you buy?

For most players, the Garmin Approach R10 is the best golf launch monitor for personal use. It tracks more than a dozen metrics, attaches video to each swing and runs up to 10 hours, all in a unit small enough to move from home to range.

Pick the Rapsodo MLM if video replay drives your improvement. Pick the PRGR HS 130-A if you want speed training without apps or subscriptions.

Pick the Garmin Approach R50 if virtual rounds on a built-in screen are the goal. And if you're building a third-party simulator on a gaming PC, the Uneekor Eye Mini Core is the fit.

Use the comparison chart to line up the specs, then match the unit to your room and your practice habit.

Our top 3 picks at a glance

  1. 1 Garmin Approach R10
    Best for all-round home practice

    Garmin Approach R10

    9.2/10 our score

    See it on Amazon
  2. 2 Rapsodo MLM
    Best for video swing analysis

    Rapsodo MLM

    8.8/10 our score

    See it on Amazon
  3. 3 PRGR HS 130-A
    Best for speed training without a ball

    PRGR HS 130-A

    8.7/10 our score

    See it on Amazon

Frequently asked questions

Do I need a subscription to use a launch monitor at home?

Not always. The PRGR HS 130-A and Voice Caddie SC200 Plus work without any app or subscription.

Garmin, Rapsodo, SkyTrak and Uneekor units show core data without paying, but virtual courses and some advanced software need an active membership or plan.

Can a launch monitor work indoors into a net?

Yes. Radar units like the Garmin Approach R10 and Voice Caddie models need a few feet of ball flight to read the shot.

Camera units like the SkyTrak ST MAX and Uneekor Eye Mini Core read impact and early flight, so they suit tighter indoor spaces with less room behind the ball.

Which launch monitors show club path and face angle?

The SkyTrak ST MAX measures club path, face angle and face-to-path. The Garmin Approach R50 reports face-to-path when you fit the tracking sticker.

Radar units at lower prices usually report ball and club speed, launch angle and distance rather than path and face numbers.

How much space do I need for a launch monitor?

Plan on roughly 8 to 10 feet from the ball to the net, plus 6 to 7 feet behind the ball for radar units. Camera units like the SkyTrak ST MAX and Uneekor Eye Mini Core sit close to the ball and need less depth behind it.

Measure your room before you buy.

Are launch monitors accurate enough to trust for practice?

Yes, for most personal practice. Radar and camera units track the same core numbers: ball speed, club speed, launch angle and carry.

The Garmin Approach R10 lists accuracy of plus or minus 1 mph on ball speed and 1 degree on launch angle.

Use the same unit consistently to track change over time.