Auto-detect every swing. Surface the one cue worth working on. Keep every session on file for life. ARC is the four-tab range coach that runs on the iPhone in your pocket — no launch monitor, no sensors, no tripod.
$99/yr founder · first 1,000 only · locks forever
A launch monitor costs $500–$2,000 and shows you the ball.
ARC is $99/yr and shows you
the swing that produced it.
A launch monitor sees the ball. ARC sees the golfer too — the body that produced the swing, the line you actually aimed at, and the patterns that build up over a session.
ARKit and on-device pose estimation track your stance, ball position, shoulder line, spine tilt, and shaft lean — the setup details that decide where the ball goes before you ever swing.
ARC anchors a 3D target line in the world. Now it can measure what you actually meant to do — not just where the ball went, but how far off your intent it landed, and whether your aim is drifting over the session.
ARC clusters your swings into patterns — the push-fade, the pull-hook, the early-extension miss — and tells you which one is dominant today. Tomorrow you pick up where you left off.
Every swing flows through the same four-tab loop. Hit captures it. See remembers it. Fix tells you what to try next. Arc tells you what changed across the bag.
Today's session expanded with a 4-up KPI. Prior sessions grouped by day, each with a shape-thumbnail dispersion preview. Tap a session to drill in; tap a rep to open replay.
The live coach picks the loudest pattern and gives you a cue you can hold in your head between balls. Below it: today's plan, in three steps you can actually finish.
Outliers and gains surface first. Below them, the metrics that drifted, the ones that improved, the ones that held — three rows of verdicts across the bag, not the swing.
Hit a ball. See the swing in context with everything you've ever hit. Fix the next ball with the cue ARC chose. The Arc tab tells you what's changed across the bag this week. One loop, four views, one swing at a time.
Tap any swing on any tab and ARC opens its rep-level Replay surface. Slow-motion video synced with body geometry, club path, and ball outcome. The numbers are stacked the same way the cue stacked them — signal first, evidence below, raw data on a tap.
No remote. No countdowns. ARC runs the loop quietly while you hit balls.
Lean your iPhone on your bag or use a $20 tripod. Down-the-line or face-on. Tap the flag for target lock.
~30 secARC auto-detects every swing. Practice swings get filtered out. No "ready?" tap, no remote in your pocket.
Auto-detectReplay's already cued. ARC names the one number that moved this swing — in plain English, not coach-speak.
~5 sec readOne thing to try, eight words or less. ARC will tell you if it actually changed on the next ball.
Loop continuesSame loop for short game and putting. ARC drops landing-spot dots in world space and measures the dispersion ellipse.
All formatsTagged swings, the pattern that dominated, and a one-paragraph narrative of what changed. Yours to keep.
Account optionalUse the phone in your pocket for capture. Prop the old one you almost traded in for $40 behind you as a viewer. ARC pairs them over Wi-Fi — no second subscription, no second device to buy.
ARC is one binary that adapts. The capture phone frames the swing. The viewer phone shows live replay at eye level — useful in indoor bays, shared sessions, or when the sun makes your main screen unreadable.
iOS 18+. Anything from 2018 on. Lean it on your bag and you're set.
Eye-level mirror of the replay and live metrics.
Hear cues spoken instead of looking down. Voice commands for hands-free control.
Tag a swing, scrap a rep, change clubs from your wrist.
Pair a Garmin R10, FlightScope Mevo, or Bushnell. ARC fuses ball numbers with body metrics for the full picture.
ARC uses Apple's Foundation Models on-device by default. Capture, pose, replay, metrics and coaching all work without a network. Connecting an external AI provider is opt-in, and yours.
Swing detection, body geometry, replay, metrics, drills, and session narrative all run locally. The range has bad signal anyway.
Camera frames, audio, and depth data don't leave the device. Not to ARC, not to a third-party model. Cloud sync is opt-in.
You can send a clip or a tagged session to your coach. Nothing is shared by default; nothing is sold, ever.
Bad lighting, half-frame, ball off-screen — ARC says "data was limited this session" rather than fake a number.
Instead of "I felt blocky on Saturday," they hand you a tagged session: 23 swings, the pattern that dominated, the metrics that flagged. You spend the lesson coaching, not interviewing.
Apply for the coach betaARC Premium is one paid feature package, billed through the App Store. The Founder tier is capped at the first 1,000 customers and the price never moves up — if you're in, you're in for life.
Capture, pose, replay, metrics, drills and coaching all run on-device by default.
Hardware required: iPhone XS or newer · iOS 18+ · Optional: second iPhone, Apple Watch, AirPods, Garmin R10 / FlightScope Mevo / Bushnell launch monitors.
Drop your email and you're on the list. We're letting golfers in every week and saving founder pricing for everyone in early. Tell us your handicap and we'll move you up.
No spam. One email when your invite is ready — and we hold your founder slot until you redeem it.