What is a VBT app?
A velocity-based training app measures how fast the barbell moves during each rep. Lifters use bar speed alongside load and RPE to judge effort and adjust training.
Power VBT
Velocity-based training from the videos you already film
Power measures mean concentric velocity, bar path and rep timing from your squat, bench press and deadlift videos — right on your phone. No sensor, no upload.
Free plan · iPhone and Android
What Power measures
- Mean concentric velocity for every rep
- Bar path with synchronized replay
- Rep timing
Supported lifts for velocity analysis: squat, bench press and deadlift only. Snatch and clean & jerk are not supported.
How it works
- 01
Pick a set video
Choose a squat, bench or deadlift training video from your library, or film with your phone’s Camera app and then select that file. Power does not record live inside the app.
- 02
Analyze on device
Power tracks the bar and calculates velocity, bar path and rep timing. Training videos are never uploaded.
- 03
Build your load-velocity profile
Analyze the same lift at 2–3 different loads. When the data quality is sufficient, Power gives a velocity-based 1RM estimate.
From estimate to measurement
Rep-based formulas (Epley, Brzycki and others) estimate your 1RM from how many reps you did. Velocity adds another view: how fast the bar moved at each load. Power keeps both — the free calculators on MaxRep for quick estimates, and video analysis when you want to see how the set actually moved.
Free plan vs Power Pro
| Free | Power Pro | |
|---|---|---|
| Video analyses | Unlimited | Unlimited |
| Full source videos kept with bar-path replay | Up to 5 at once | Unlimited local storage |
| Numerical results, load-velocity profiles, history, calculators | Kept even after releasing a video | Included |
| Purchase | — | Annual subscription or one-time lifetime purchase |
Free to start. Power Pro is available in the stores. Prices are shown there and vary by storefront.
Private by design
Your training records stay on your device. Filter analyses by lift and source, release videos while keeping their data, or delete records whenever you choose.
Built-in strength tools
1RM from load and reps · DOTS, IPF GL, Wilks and Wilks 2020 · working weights and plate loading · BMI, FFMI, energy estimate and heart-rate zones.
Questions
Do I need a sensor or linear transducer?
No. Power works from video of your set.
Which lifts does Power support for VBT?
Squat, bench press and deadlift. Olympic lifts (snatch, clean & jerk) are not supported for velocity analysis.
Can I record inside the app?
No. Select an existing training video. Film with the system Camera app if you need a new clip, then import it.
Are my videos uploaded?
No. Analysis runs on your device and training videos are never uploaded.
How does Power estimate 1RM from velocity?
Analyze the same lift at 2–3 different loads to build a load-velocity profile. When data quality is sufficient, Power provides a velocity-based 1RM estimate. Treat it as a training reference.
Is Power free?
Yes, with unlimited video analysis and up to 5 full source videos stored at once. Power Pro adds unlimited local video storage, as an annual subscription or a one-time lifetime purchase. Prices are shown in the App Store and Google Play and vary by storefront.
Is it on Android?
Yes. On Google Play (com.knockdream.power), choose a squat, bench press, or deadlift training video. The analysis runs on the device.
Is this medical advice?
No. Results are for training reference. Adjust loads for your readiness and consult a qualified coach when appropriate.
Measure your next set
Download Power free on the App Store or Google Play.