Terms of Use

Trace · version 1.5 · updated 24 September 2026

The agreement between you and Trace. It is short because the app does little on your behalf: it measures your own climbing on your own phone.

What Trace is

Trace records or imports a video of you climbing, estimates where your joints were in each frame, and reports measurements of how you moved. It also photographs a wall and picks out holds by color.

Trace is a measuring instrument and a training aid. It is not a coach, a physiotherapist, or a medical device, and nothing it says is medical advice.

Climbing is dangerous

You climb at your own risk. Trace cannot see the ground, your pads, your spotter, whether a hold is loose, or whether you are too tired to be on the wall. Never let a drill or a suggestion from this app override your own judgment, your gym's rules, or your partner's.

Do not use this app while you are on the wall. Set the phone down, climb, then look at it.

To the fullest extent the law allows, we are not liable for injury, loss or damage arising from your climbing or from your use of Trace.

What the measurements are worth

Every number Trace produces is an estimate from a single camera. It does not know how far away you were unless you tell it your height, and even then the scale is inferred rather than measured. Distances, speeds and energies are approximations, and the app says so where it shows them.

Trace compares your attempts against your own earlier attempts. It does not rank you against other climbers, and it deliberately never judges your choice of sequence: it measures how you moved, not which holds you chose.

When tracking is poor, Trace says so and declines to give feedback rather than guessing. Treat that refusal as the honest answer it is.

Your account

You need an account to use Trace. Keep your password to yourself; you are responsible for what happens under your account. Tell us if you think someone else has it.

One person per account. Do not share one.

Trace Pro

Your first three goes are free, and a go is anything that gives you feedback: a climb recorded, a clip imported, or a wall scanned. After that, recording, importing and scanning require a Trace Pro subscription.

Trace Pro is sold through the App Store and billed to your Apple ID at the price shown before you confirm. It renews each period until you turn renewal off, which you do in Settings under your name, then Subscriptions. Turning it off at least 24 hours before the next renewal stops that charge.

Refunds are handled by Apple, not by us, under Apple's own policy.

If your subscription ends, everything you have already scanned and analyzed stays on your phone and stays readable. You simply cannot scan new routes until you subscribe again.

If the price changes, Apple will ask you to agree before charging the new amount.

Your content is yours

Your clips, photographs and measurements belong to you. We claim no license over them, which is easy for us to promise because we never receive them.

Do not record someone who has asked you not to, and do not use Trace to film anyone in a place where they would expect privacy.

Fair use of the app

Do not reverse engineer the app, work around the subscription, or use it to build a competing product. Do not use it for anything unlawful.

No warranty

Trace is provided as it is. We do not promise it will be accurate, uninterrupted, or fit for any particular purpose. Pose estimation fails in poor light, at distance, and when you face into the wall, and some clips will simply not track.

Where the law does not allow us to exclude liability, we do not attempt to.

Ending it

You can stop using Trace whenever you like, and delete your account from Profile. We may end an account that breaks these terms.

These terms are governed by the laws of the Commonwealth of Massachusetts, United States.