Support

What do I need to use arc?

An iPhone 15 Pro or 15 Pro Max, or an iPhone 16 or later model, running iOS 18 or later — and something to prop it up: a tripod, golf bag, water bottle, or any stable surface. The app does not run on the iPhone 15, iPhone 15 Plus, or earlier models, for recording, replay, or Second Screen. You also need an arc account and an active Arc+ subscription to record. No additional hardware, sensors, or accessories are required.

Do I need a subscription?

From ARC 1.0.3: Arc+ unlocks practice recording, coaching, comparisons and practice tools. Monthly and annual subscriptions provide the same access, and an eligible 7-day free trial includes the same full Arc+ access as a paid subscription. Your previously available saved swings remain available to replay after your trial or subscription ends, while their media is retained. Feature availability still depends on supported devices, software and sufficient practice evidence. Account, purchase restoration, subscription management and data controls remain accessible without an active subscription. Second Screen extends an entitled capture iPhone's session; the connected viewer does not need a second subscription. Check the purchase screen and Apple's confirmation sheet for the current price, billing period and trial eligibility. Subscriptions renew automatically until canceled. See Terms for full renewal and cancellation terms.

How do I cancel, or restore a purchase?

Apple handles billing. Cancel through the Apple Account used to buy the subscription: iPhone Settings → your name → Subscriptions → ARC. Apple advises canceling an unwanted trial at least 24 hours before it ends. Deleting the app or deleting your arc account does not cancel the subscription, and a subscription cannot be moved to a different arc account. If you already bought Arc+, use Restore Purchases; email us if access still cannot be confirmed.

How do I set up for a session?

In ARC 1.0.3, sign in and open HIT > Set up session > Range > Start. Allow Camera and prop a supported iPhone behind you with the full swing visible. Recording requires Arc+ access. Microphone is optional for impact sound and voice; Start does not require it. Other permissions accompany optional features: workout saving for a paired Watch, Motion & Fitness on Watch/headphones, Local Network for a viewer, Bluetooth for a launch monitor, and Music when you choose Apple Music. You can decline optional permissions; the related feature may be unavailable.

Does arc work at a busy range?

arc is built for noisy, crowded range environments, and each swing is verified against motion, audio, and impact evidence together rather than a single signal. Detection is still not guaranteed for every swing or every range condition. If a swing is missed, or an unwanted capture appears, check framing, lighting, camera stability, and nearby movement, and review the recorded clip before relying on a conclusion.

How accurate are ARC's metrics?

Club head speed and ball speed are estimated from wrist velocity, LiDAR depth, and lever ratios. They are approximations — not launch monitor measurements — and are best used to track relative changes between sessions. arc does not promise phone-measured ball speed, carry, or spin, or precision biomechanics. Carry and launch are shown only when arc is paired with a compatible launch monitor, and those readings keep their source.

Do I need an internet connection?

Yes, for sign-in, Arc+ verification, and synchronization. Swing detection, pose analysis, and biomechanics run on the device, but practice recording requires a signed-in account with an active subscription, and while you are signed in your clips and session records upload automatically. Local capture and replay do not make arc a fully offline or account-free service.

What are the coaching labels?

arc detects common swing faults and labels them in plain English: "Over the Top", "Early Release", "Jerky Tempo", "Early Extension", "Hanging Back." These are the same terms your golf coach would use. Labels only appear when the fault is detected with sufficient confidence.

Where is my data stored?

Camera frames are analyzed on your iPhone, but while you are signed in your swing clips, session records, and per-swing analysis evidence upload to our cloud storage automatically, and there is no in-app switch to turn that off. Your account, practice records, and analysis evidence are hosted by Supabase in the United States (AWS us-east-1). New swing video clips are stored by Cloudflare R2; clips uploaded before 8 September 2026 remain in Supabase Storage. See our Privacy & Model Improvement page for the full list of services and what each one receives.

How do I delete my data?

To delete your account and its cloud data, open Account → Account safety → Delete account and read the confirmation. To delete one session, use its three-dot menu → Delete in the Replay session library — but note that this removes the session from the phone and from your in-app history and does not remove the cloud copy. Account deletion, session deletion, and canceling your Apple subscription have three different effects. Read the data deletion page before proceeding, or email [email protected].

Does arc use Apple Health?

ARC 1.0.3 reads no Apple Health data on iPhone or Apple Watch. For a paired ARC Watch, iPhone requests share-only permission to save workouts during setup; that authorization is shared with Watch. iPhone also starts the Watch workout, but does not itself save workouts. See Privacy for workout saving and earlier versions.

Do you use my data to train models?

arc does not currently run a model-improvement or research-contribution program. There is no such control in the app and no consent record has been collected. Using arc does not give us permission to train on everything you record. If we introduce such a program, we will describe it on our Privacy & Model Improvement page — its purpose, scope, and choices — before it operates.

Does arc use third-party AI providers?

Supported coaching uses Apple's on-device Foundation Models, subject to device, software, model and language availability, not Private Cloud Compute. Anthropic coaching is disabled for launch; entering an API key does not enable it. See Privacy for earlier provider records.

What iPhone models are supported?

arc requires an iPhone 15 Pro or 15 Pro Max, or an iPhone 16 or later model, running iOS 18 or later. It does not run on the iPhone 15, iPhone 15 Plus, or earlier models. AI coaching requires a supported device on iOS 26 or later, with model and language availability. The optional Apple Watch app requires watchOS 26 or later.

Does arc work with Apple Watch?

Yes, optionally; ARC works without a Watch. In ARC 1.0.3, Watch asks permission to save workouts, not read Health data, plus Motion & Fitness for movement. Save practice to Apple Health under Account > Settings > Practice controls saving: on for new installs, off after updating from 1.0.2 until enabled. Practice with at least three verified swings and three armed minutes can save as a golf workout. Saving off or nonqualifying practice discards the temporary workout; interruptions may prevent saving. ARC does not upload the saved Health workout. Per-swing movement evidence, including steps, distance and cadence from Motion & Fitness, syncs through iPhone. ARC 1.0.3 does not read or newly upload heart rate, active energy or baseline differences; older records may contain them. See Privacy for earlier versions.

arc isn't detecting my swings

Check that: (1) the app shows it can see you, (2) your phone is stable and not moving, (3) you are framed so your full swing is visible, (4) camera permission is granted in Settings (microphone is optional), and (5) your Arc+ subscription is active — recording requires it. In ARC 1.0.3, previously available saved swings remain replayable after access ends while media is retained; recording new practice requires renewed access. On a busy range, move to reduce audio interference from adjacent bays.

Biomechanics data is missing

Biomechanics require clear visibility of your full body. Ensure: (1) the camera can see you from head to feet, (2) lighting is sufficient, (3) you are not too far from the camera. Some metrics require several swings before they can be computed, and a missing comparison does not mean the saved swing failed.

A clip hasn't reached my Second Screen

Second Screen sends clip video directly to the connected device over a local peer-to-peer connection, so both devices need to stay on the same local connection. Check the connection state shown in the app if a clip has not arrived.