Automatically track reps, identify exercises, and more.
All in one wearable built for longevity.
One number combining intensity, movement quality, and your goals to show whether you got your dose.
Sets, reps, and rest periods detected from your wrist. No logging required.
See whether each muscle group got maintenance, growth, or overload stimulus.
Track how your range of motion and rep velocity change as you fatigue.
Balance work and rest with real-time heart rate and time-under-tension analysis.
How it's different
Every wearable on the market reduces your lifting to calories and heart rate zones. Fort is the first that actually measures what your muscles did.
Fort detects your exercises, reps, tempo, and rest automatically, then computes how hard your muscles actually worked. Per set.
Rep velocity slows down as a set gets harder. Fort uses that plus heart rate to estimate proximity to failure. No logging.
Fort maps weekly stimulus across muscle groups. Push vs pull, upper vs lower, quads vs hamstrings. See what's lagging.
Mechanical output tracked over weeks. Fort shows you when you're building, when you're coasting, and when fatigue is stacking up.
One wearable for your whole day, not just your workout.
From barbell compounds to cable accessories, Fort knows what you're doing.
Every rep measured for velocity, ROM, and effort.
See at a glance how much meaningful training remains.
A complete picture of session demand, not just heart rate.
Train in the right zone, every session.
Track aerobic fitness improvements week over week.
Steps, calories, and movement — tracked automatically.
Deep, light, and REM measured every night.
Wake up knowing whether to push or rest.
See how your body restores while you sleep.
HRV patterns reveal your nervous system state throughout the day.
See how work, travel, and training affect your recovery.
Catch compounding stress before it affects your training.
Slip on Fort. Under 30g, 7-day battery, and straps to match your style. Wear it all day, all night.
Fort quantifies every rep, set, and rest period — then maps effort across your muscles, automatically.
See your strength score, muscle balance, and whether you're progressing — week over week.
Pre-Order Member“I was tired of my wearable giving me more strain for climbing stairs than for spending two hours lifting.”
Every metric is derived from continuous sensing and proprietary models.
Every rep is isolated from continuous IMU data at 100Hz. Velocity, range of motion, and tempo are extracted from acceleration and rotation.
Heart rate response and movement kinematics are fused to estimate muscular effort and proximity to failure — per set, automatically.
Exercise detection feeds a stimulus model that maps mechanical work to specific muscle groups across your training week.
Weeks of rep-level data reveal patterns invisible in a single session: progressive overload, plateau detection, fatigue accumulation.
Built by former Tesla engineers who believe strength training deserves real measurement.
Backed by
Plus angels from OpenAI, Tesla, and more.
Ships Q3 2026