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Velocity based training with just your iPhone

Track your bar speed and log all your sets with the Metric VBT workout tracking app - no devices or hardware required.
Velocity, power, tempo and ROM data
HD playback & lifting video storage
Workout tracker and gym training log
Perfect for lifters, athletes, and coaches
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Screenshot of MetricVBT velocity tracking app interface displaying important metrics and data analysis
Fit woman performing a jerk exercise with a barbell

Track your bar speed.
Dominate the gym.

Track velocity on 60+ exercises, log your workouts, chart progress, and monitor fatigue and performance in real-time with the Metric VBT app.
Perfect for Powerlifters, S&C, CrossFit, Weightlifting, and anyone serious about their strength training.
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Loved by lifters around the world

With over 500,000 sets recorded across 100+ countries, Metric is your go-to tool for accurate velocity tracking in the gym.

For not needing to buy any equipment this is a great tool. The vbt trackers go from 400 and up so for this to do what it does with nothing is amazing.


Super simple to download and just start using. Great for getting clients and athletes to engage with their training in new ways.

Can’t believe this hasn’t been done sooner! Well done team


I can’t believe how easy this makes VBT training compared to the old way of using wearables and external hardware.

This app is brilliant, can’t wait to see what’s next!

Finnian EK

Amazing to not have to pay thousands for a unit or even attach anything to a bar.

Just click record on your camera and I can track my athletes Bar Velocity so easily as well as see form breakdowns etc.



Tried for the first time today. Tracking seems excellent, very very good for checking bar path.

I've never used velocity based training before ... but I do plan to use this moving forward in my training.


It’s not just a “you don’t need an accelerometer / cord attached to the barbell” solution. Video is actually better... as it gives you form analysis, not just power and bar path, given that you can calculate for that at all, which nearly all other apps can’t.

Honestly can’t recommend it highly enough if you are at all interested in optimising your performance with barbell exercises.


How to record your velocity

Record bar speed, store all your lifting videos, and track progress with Metric - VBT as easy as taking a selfie.
Want to learn more? Check out our user guide or contact us at

How Metric VBT Works

Metric's precision algorithm measures bar speed while you lift to deliver detailed insights in real-time with just your iPhone
How accurate is Metric
Front view of Metric VBT app video playback showing its features and bar path tracking
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Metric for Teams

Unlock the benefits of velocity tracking with your clients and athletes. Effective and easy to use, start improving coaching outcomes now!
Screenshot of Metric VBT Teams dashboard showing various team channels and conversations"
Learn more about Metric Teams

Frequently Asked Questions

The Metric algorithm is a patented video analysis method of accurately measuring barbell movement from video. Record your lifts with the app, and Metric will track the barbell in real-time to precisely calculate the change in position for every rep. No additional equipment is needed, but your iPhone or iPad should be positioned side-on and in a stable position.

Metric has been tested against traditional VBT devices and accelerometers, and matches or exceeds their performance in normal conditions. Metric was compared against full 3D-motion tracking systems during development to create our baseline algorithm.

Learn more about the reliability and validity of MetricVBT →

Metric does not require any additional hardware other than your iPhone or iPad to work. All you need is an iPhone X or newer running on iOS 16 or later, or a iPad newer than 2021 running on iPadOS 16 or later.

To ensure your recordings are accurate it helps to have a tripod or stable object to position your phone against – leaning your device against a kettlebell, water bottle or similar works great!

Metric is completely free to use for recording unlimited training set videos.

Start with a free Metric Basic profile and explore the different ways Metric can enhance your training.

When you are ready to level up subscribe to Metric Pro for your full training history, advanced analytics, extra metrics, progress charts, and a workout builder. Enjoy a 14-day free trial to test Pro features within the Metric VBT app.

For coaches or trainers, our Teams option provides additional features for managing and recording data for your clients and athletes. Our cost-effective Teams plans start with a 14-day free trial and scale with the size of your roster. Learn more about Teams here.