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Record strength training with Apple Watch and review rep velocity and workout metrics on iPhone.

Contact

For problems or feedback, email us.

To help us investigate, include your iPhone and Apple Watch models, iOS/watchOS and VBT versions, when the issue occurred, the actions immediately before it, expected and actual behavior, and any relevant error message or screenshot. Include only what is needed and hide other people's information and private content.

Getting started

  1. Install VBT on your paired iPhone and Apple Watch.
  2. Open VBT on Apple Watch and allow the permissions needed for recording.
  3. Choose an exercise, weight and countdown, then start recording a set.
  4. Finish recording after your set and check the transferred record on iPhone.
  5. Open the set to view rep velocity and analysis. You can edit the exercise or weight and exclude or restore incorrectly detected reps.

Frequently asked questions

My Watch recording is missing on iPhone

Check that the devices are connected and open VBT on both. Transfer may be delayed by connectivity or operating system scheduling. If it still does not arrive, check power and available storage, then contact us. Contact support before reinstalling: removing the app or resetting a device before transfer can lose records.

Rep counts or velocity look wrong

VBT uses movement from a Watch worn on your wrist. Fit, technique and exercise type can affect accuracy. Check the exercise and weight. Exclude or restore incorrectly detected reps in the iPhone set detail screen.

Estimated 1RM is missing

Estimated 1RM requires suitable records, including different weights for the same exercise. It may be unavailable when there is insufficient data or calculation conditions are not met.