GolfTrak

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I’m going to say something that might sound like an exaggeration, but it’s not: GolfTrak is the most important launch monitor app you’ve never heard of.

It has been around for seven years. Seven years of algorithm refinement, AI model training, and real-world testing by thousands of golfers. It turns your iPhone into a launch monitor — ball speed, launch angle, club path, spin — and it connects to GSPro and E6 Connect. The same GSPro that runs on $6,000 launch monitors. The same E6 Connect that sim centers use.

For $100 a year.

The free tier gives you basic shot tracking forever. The PRO tier ($100/year) unlocks GSPro and E6 integration, unlimited shot tracking, and detailed session analytics. The PRO + E6 tier ($200/year) adds five E6 courses, online games, and skill challenges.

I tested it against a Bushnell Launch Pro to see how close a seven-year-old iPhone app can get to a $2,499 three-camera launch monitor. The answer is: closer than you’d think, not as close as you’d hope, and more than enough for what most people need.

How It Works

GolfTrak uses your iPhone’s rear-facing camera to capture the ball at impact. It doesn’t need any external hardware — no sensor pads, no radar modules, no infrared lights. You put your phone on a tripod, position it about six feet behind the ball (same position as a Mevo+ or RSG One), aim the camera at the hitting zone, and swing.

The app captures the ball in motion, analyzes the video frames using proprietary AI and machine learning models, and calculates ball speed, launch angle, and launch direction from the camera data. Club path is measured directly from the club’s movement through the frame. Spin, spin axis, and distance are calculated from the ball flight characteristics.

The key word there is “calculated.” GolfTrak doesn’t measure spin directly the way a GC3 or RSG One does with marked balls. It estimates it. That’s the fundamental limitation of any phone-based launch monitor — the camera just doesn’t have the frame rate or resolution to read ball markings in flight.

But here’s what makes GolfTrak different from every other phone app: it’s been doing this for seven years. The algorithm has been refined across hundreds of thousands of sessions. The AI model has been trained on more real-world data than any competitor. It’s not a startup’s first attempt at computer vision — it’s a mature product that has been iterating since 2019.

What It Tracks

GolfTrak gives you the following metrics:

• Ball speed (measured)
• Launch angle (measured)
• Launch direction (measured)
• Club path (measured)
• Club face angle (calculated)
• Backspin (calculated)
• Sidespin / spin axis (calculated)
• Carry distance (calculated)
• Total distance (calculated)

That’s a solid set of data. It won’t give you smash factor, angle of attack, or face-to-path — those need a multi-camera system like the GC3. But for the core metrics that tell you whether you hit it solid and where it went, it has everything you need.

Accuracy Test: GolfTrak vs. Bushnell Launch Pro

I set up both units side by side and hit 20 shots with a 7-iron. Here’s what I found:

Ball speed: Within 2-4% of the BLP. Close enough for practice. The GolfTrak consistently read a few mph lower than the BLP, but the variance was consistent — if you’re tracking changes in your ball speed session to session, the trend line is reliable.

Launch angle: Within 1-2 degrees. This was the most impressive metric. GolfTrak’s launch angle readings were consistently close to the BLP, and the direction (left/right) was almost always correct.

Carry distance: Within 5-8 yards. This is where the calculation catches up to you. The GolfTrak’s carry estimate is based on calculated spin, which means it’s less accurate the more spin affects the shot. A high-spin wedge shot had more variance than a mid-iron.

Spin: The weakest metric. GolfTrak’s spin numbers were in the ballpark — 5,000 RPM on a wedge vs. 6,500 on the BLP — but not consistent enough for wedge gapping or dialing in spin control. For driver and long irons, where spin is lower, the accuracy was better.

The Honest Take

Is it as accurate as a $2,499 launch monitor? No. It’s a phone camera.

Is it accurate enough to practice, track improvement, and play sim golf? Yes. Unequivocally. If you’re a 15-handicap trying to figure out your carry distances and hit more greens, GolfTrak will tell you what you need to know. If you’re a single-digit handicapper trying to dial in wedge gapping within two yards, you need dedicated hardware.

But here’s the thing: GolfTrak costs $100/year. The Bushnell Launch Pro costs $2,499 plus $199-499/year in subscriptions. Over three years, the BLP costs $3,096+ while GolfTrak costs $300. Is the BLP 10x more useful? No. Not for most golfers.

The GSPro and E6 Integration: The Killer Feature

This is the reason GolfTrak exists as a category of its own. No other phone-based launch monitor app connects to GSPro.

RSG Mobile uses its own RSG Club software. ShotVision shows data on your phone. Golfboy has a basic range mode. None of them connect to GSPro or E6.

GolfTrak connects to both.

That means you can take your iPhone, set it up on a tripod in your garage, connect to GSPro on your gaming PC, and play any of the 4,000+ courses in the GSPro library. You can play Augusta. You can play Pebble Beach. You can play St Andrews. The same courses that GC3 and Falcon owners play.

The accuracy won’t be the same. The ball flight physics will be driven by GolfTrak’s data, not a $6,000 launch monitor’s data. But you’re playing real courses on real software. That’s a fundamentally different experience from the phone-only apps that just show you a driving range.

Software and Pricing

Tier	Price	What You Get
Free	$0	Basic shot tracking, limited sessions per day
PRO	$9.99/mo or $100/yr	Unlimited sessions, GSPro integration, detailed stats, GolfTrak Portal
PRO + E6	$29.99/mo or $200/yr	Everything in PRO + 5 E6 courses, online games, skill challenges

The free tier is genuinely useful for testing. You get basic shot tracking — ball speed, launch angle, carry distance — with a daily limit. It’s enough to see if the app works with your phone, your lighting, and your swing.

The PRO tier at $100/year is where the value lives. GSPro integration alone is worth it. If you already have a gaming PC and a hitting net, $100/year to play 4,000+ GSPro courses is the cheapest sim experience in existence.

The PRO + E6 tier at $200/year is for people who want the E6 course library alongside GSPro. Five courses is a small sample, but E6’s online play and skill challenges are decent for competitive practice.

What You Actually Need

• An iPhone (iOS 17.6+). iPhone 11 or newer recommended. The camera quality matters.
• A tripod. You need a stable, fixed camera position about six feet behind the ball. Handholding won’t work.
• A hitting net or enclosure. Same as any sim setup.
• A hitting mat. Optional but recommended for consistent setup.
• A Windows PC if you want GSPro or E6 integration. The app runs on your phone, but the sim software needs a computer.
• Good lighting. This is the hidden requirement. GolfTrak needs consistent, even lighting to track the ball accurately. Direct sunlight from a garage door window or a dim basement with a single bulb will both cause problems. Overhead LED lighting works best.

GolfTrak vs. RSG Mobile: Which Phone App Should You Buy?

This is the natural comparison since both are iPhone-based LM apps from established companies.

GolfTrak ($100/yr PRO): Connects to GSPro and E6. Better accuracy from 7+ years of algorithm refinement. Works indoors and outdoors. The free tier lets you test before buying. But it’s a subscription — you pay every year.

RSG Mobile ($149 one-time): No subscription for basic play. Uses the same RSG Club software engine as the RSG One. 36 courses with the Club membership ($199/yr). But no GSPro or E6 — locked to RSG’s ecosystem.

The choice is simple: if you want GSPro (and you probably do), buy GolfTrak. If you want a one-time purchase and are happy with RSG’s course library, buy RSG Mobile. Both are good. They serve different priorities.

I wrote a full comparison of all five phone-based LM apps in the best golf launch monitor apps roundup if you want the complete picture.

Who This Is For

Buy GolfTrak if:

• You want GSPro access for the lowest possible cost
• You’re not sure if sim golf is for you and want to test with the free tier
• You already have a Windows PC and hit into a net
• You want an app that works both indoors and at the range
• You don’t mind a subscription for continued use

Who This Is NOT For

Skip GolfTrak if:

• You need tournament-grade accuracy — buy dedicated hardware
• You’re on Android — iPhone only
• You want a one-time purchase with no ongoing cost — RSG Mobile is better
• Your garage has inconsistent lighting — accuracy will suffer
• You want E6 courses without paying for the top tier — the PRO + E6 tier adds $100/year

The Verdict

GolfTrak is the best phone-based launch monitor app, period. The GSPro integration makes it a category of one. No other app lets you play 4,000+ GSPro courses from your iPhone.

Is it as accurate as a $2,000+ launch monitor? No. But it doesn’t need to be. It needs to be accurate enough to practice, play, and improve — and after seven years of development, it is.

For $100/year, you get a launch monitor that connects to the best sim software in the world. That’s a value proposition no dedicated hardware can match. Start with the 7-day free trial, see if it works with your setup, and decide from there.

The risk is zero. The upside is playing GSPro from your phone. That’s worth a download.

Download GolfTrak from the App Store