Mark-1 Clip
The bar tracks
the reps.
You just lift.
In development. Not for sale yet. The people on this list hear first.
The first barbell clip that automatically logs every set, rep, and rest — no phone between sets, no manual entry, no disruption.
What it does
Everything your workout app does.
Without touching your phone.
Auto-tracks every rep
Built-in accelerometer and pressure sensors detect your lift pattern as you work. No button press required.
Logs sets and rest
The device knows when you're lifting and when you're resting. Both are recorded — automatically, in sequence.
Session drafts itself
Open the app when you're done. Every exercise, set, weight, and rest period is already logged. Tap confirm.
Clips to any barbell
Standard 25mm and 50mm bars. No tools, no tape, no modification. Mounts in under five seconds.
30+ sessions per charge
Long battery life means you charge it weekly, not daily. It works as long as you do.
Companion app
Review history, track progress, and manage your library of exercises. Available on iOS and Android.
How to use it
Three steps.
Same as any other session.
01
Clip it on.
Slide Mark-1 Clip onto the collar area of any standard barbell. The magnetic latch locks in under five seconds. No tools. No straps.
02
Train normally.
Do your workout exactly as you always have. The device tracks automatically in the background — sets, reps, weights, rest. You focus on lifting.
03
Confirm in 30 seconds.
Open the app when you're done. Your full session is already drafted. Review it, make any edits, and tap confirm. That's your log.
Machined aluminum crown
How it works
Built to disappear
into your training.
Mount detects contact
The moment you press Mark-1 Clip onto the bar, the latch mechanism engages and the device powers on. No button, no app required.
Sensors track movement
A 6-axis IMU accelerometer reads bar movement 200 times per second. The firmware distinguishes reps from noise — eccentric, concentric, and lockout phases each have a distinct signature.
Exercise is identified
Movement patterns are matched against a library of barbell exercises. Squat, bench, deadlift, row, press — each has a unique acceleration profile. Unknown patterns are flagged for you to label once.
Session log is built
Sets, reps, rest periods, and exercise sequence are assembled in real time on the device. When you remove the clip, the session is complete and syncs via Bluetooth.
You confirm the draft
The app presents the full session — every set in order, pre-filled weights from your history, rest times included. Confirm what's right, adjust what isn't. Done in 30 seconds.
Specifications
Follow the build
Stay close to what we're making.
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