Push.
Measure.
Master.

XTrainr 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?
50HzSensor sample rate
5mmPosition accuracy
0.01°Tilt & lean accuracy
3DSensor fusion
Intelligence

Every rep. Every angle. Every watt.

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 & Tare

Clip to bar, dumbbell or machine. One tap resets all angles and orientation to your starting point.

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.