Last updated: 2 September 2026
BarTrace records wrist motion on Apple Watch during barbell sets and analyses each rep on your paired iPhone: rep count, range of motion, tempo, bar velocity, velocity loss and sticking points.
If you have a question, found a problem, or want to request a feature, send an email and we will help.
Email: hello@lindahoeberigs.com
Response time: within two working days.
Helpful to include: your iPhone and Apple Watch models, the iOS and watchOS versions, the BarTrace version from the app's FAQ screen, and what you were doing when the problem happened.
Recording runs inside a workout session, which needs Health permissions. Open the Watch app on your iPhone, go to Privacy and Security, then Health, and confirm BarTrace is allowed to read and write workout data. If permission was declined the first time, it has to be granted there rather than inside BarTrace.
Sets transfer over Apple's device-to-device connectivity, which needs both devices paired and in range at some point after the set. Keep the iPhone nearby and open BarTrace on the phone. A set recorded while the phone was far away transfers once the two are close again. If it still has not arrived, make sure both apps are updated to the same version.
This usually means the workout session ended. Check that Health permissions are granted, that low power mode is off on the watch, and that no other workout app is running a session at the same time. Only one workout session can be active at a time.
Rep count, range of motion, tempo and velocity are the metrics to rely on. The bar path shape is a reconstruction from wrist motion, not a camera measurement. Use it to compare reps against each other, within a set and between sessions, rather than as a precise record of where the bar was in the room. BarTrace is a training tool. It is not a medical device and it does not give medical advice.
Squat, bench press and deadlift.
Everything is recorded, processed and stored on your iPhone and Apple Watch. There is no server and no account. Deleting the app from your iPhone removes the training history it holds. Workouts written to Apple Health are removed through the Health app, not through BarTrace. Full detail is in the privacy policy.
No. There is no account, no sign-up, no subscription and no in-app purchase.
You can browse the app and look at existing history on the iPhone, but recording a set requires a watch, because the motion sensors doing the measuring are on your wrist.
Email the address above with a description of what you expected and what happened instead. If the problem involves a specific set, tell us the date and the lift so it can be matched to what you are seeing.
BarTrace collects no data. The full policy is at hoeberigs.github.io/bartrace-privacy.