Sports + Fitness Move smarter, train harder

Real-time velocity-based training intelligence — Push.
Measure.
Master.

XTrainr is a wireless personal trainer in your pocket.

Real-time 3D motion intelligence — velocity, force, angles, tempo, depth, form and fatigue — from a single clip-on sensor.

No cameras. No cables. No compromise.

What if you could predict your whole workout from the first set?
What if a system could tell you when you're actually ready to go heavier?
What if you could measure form, fatigue and RPE — without sensors all over your body?
400HzSensor sample rate
5mmPosition accuracy
0.01°Tilt + lean accuracy
3DSensor fusion
Intelligence

Every rep. Every angle. Every millisecond.

XTRAINR captures what cameras, scales and basic wearables cannot. The complete 3D physics of your movement — in real time.

Set Progression + Fatigue

Velocity Loss · Power · Heart Rate
1.181.12 1.040.95 0.830.70 0.560.40 R1R2 R3R4 R5R6 R7R8 VL% = 66% → End set

Track mean and peak velocity across every rep. Watch fatigue build in real time and know the exact moment to stop — not when it hurts, but when the data says so.

Range of Motion

Depth · Tempo · Eccentric / Concentric
ECCENTRIC ↓ CONCENTRIC ↑ 0 400 mm 408 mm 371 mm ↓ TUT 3.9 s · ecc 2.3 s / con 1.6 s Rep 1 Rep 4 Rep 8

Track range of motion rep-by-rep. Catch depth loss as fatigue builds — and validate eccentric control against your personal benchmarks.

Real-Time Coaching

A personal trainer in your pocket

XTrainr doesn't just record — it coaches. Using your profile, session history and real-time motion data, it tells you exactly what to do next.

  • ⚡
    Velocity Loss AlertsStop before you compromise recovery. Know when a set is done.
  • 📐
    Form CoachingReal-time tilt, lean and twist feedback. Catch asymmetries before they become injuries.
  • ⏱
    Rest + Recovery IntelligenceKnow when you're actually ready for the next set — not just when the timer says so.
  • 📈
    Load ProgressionXTrainr tells you when you're ready to go heavier — backed by your own data, not guesswork.
⚡Velocity Loss Warningnow

Rep 5 velocity dropped 28.7% below your peak. Approaching threshold — consider ending set to protect recovery.

This rep0.82 m/s Rep 11.15 m/s VL%28.7%
📐Form ObservationSet 3

Y-axis drift detected on concentric phase — left-side lean 4.7°. Improving vs. Set 1 (15.2°).

Y Lean−4.7° X Tilt+2.1° Trend↑ Better
📈Ready to ProgressPost-session

3 consecutive sets at 100 kg with VL% within range. You are ready to attempt 102.5 kg next session.

Sessions3 ✓ Avg VL%18.3% Recommended102.5 kg
Setup

Ready. Set. Go.

01

Turn on + Connect

Power up XTrainr and open the app. Pairs in seconds. No cables, no ceremony.

02

Mount + Prepare

Clip to bar, dumbbell or machine. One tap and it's ready for you to begin.

03

Lift

Every rep captured automatically. Velocity, force, angles, depth, tempo and RPE — in real time, zero manual logging.

Early Access · Patent Pending

Push.
Measure.
Sleep.
Repeat.

XTrainr is opening early access soon to performance coaches, professional trainers and industry partners.

One sensor, one app, all the results.