BarbellVBT measures real-time barbell velocity (m/s)
using your Apple Watch accelerometer — bringing
professional Velocity-Based Training (VBT) to everyone.
No expensive dedicated devices needed. Just your
Apple Watch.
【Scientifically Validated】
A 2023 study by the Swiss Federal Institute of Sport
(SFISM) and ETH Zurich confirmed that the wrist-worn
Apple Watch achieves barbell velocity measurement
accuracy (r = 0.952–0.965) equivalent to professional
VBT devices.
(Achermann et al., Sports 2023,
DOI: 10.3390/sports11070125)
【Key Features】
Real-Time Barbell Velocity
Measures vertical barbell velocity in real-time
using Apple Watch sensors. Displayed simultaneously
on iPhone speedometer.
8 Exercise Modes
Squat, Bench Press, Deadlift, Overhead Press,
Snatch, Clean, Kettlebell, and Custom mode.
Automatic Velocity Zone Classification
Automatically displays Power, Dynamic, SPD-STR,
Strength, and Max Strength zones based on
measured velocity.
Athlete History Management
Manage training data for multiple athletes
individually. Records peak velocity, rep count,
and velocity loss per set.
Ready Alert System
Detects stillness and notifies you when
measurement is ready via haptic feedback.
Velocity Loss Monitoring
Calculates real-time velocity loss compared to
the first rep in a set, providing an objective
measure of fatigue.
【Supported Devices】
iPhone (iOS 16 or later)
Apple Watch Series 4 or later (watchOS 9 or later)
【What is VBT?】
Velocity-Based Training is a scientific training
method that adjusts training intensity based on
barbell movement speed. A method used by elite
athletes — now accessible to everyone.
【Update Roadmap】
v1.0 (Current)
Real-time Apple Watch velocity measurement
8 exercise modes
Athlete history management
Coach mode
v1.1 (Next Quarter)
Apple Watch Standalone Mode
— Record workouts with Watch only, no iPhone needed
— Auto-sync when iPhone is connected
v1.1 Training Game Mode
— Gamified training to hit target velocity zones
— Speed challenges and performance rankings
v1.2+ (User Feedback Updates)
Load-Velocity Profile
Automatic 1RM prediction
Session trend graphs
Price increases with each update.
Now is the best time to start at the lowest price.
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