Notch scores every rep you do

with 4 sensors that read every move, like a coach standing behind you

Download appGet the Kit

As seen on

Forbes, Smithsonian, TechCrunch, Digital Trends, Wired, Ars Technica, Yahoo

Data-driven strength training

Front rack position with the chest sensor in the t-shirt

Fix your form on every rep

Depth on the squat, the setup on the pull, the lock out at the top, all checked as you lift

Back squat with the sensors on

Avoid the injuries that set you back

Lower back injuries, lifter's elbow and torn rotator cuffs all start as form breakdown Notch can see

Standing over the bar with sensors on the arms

Lift the right weight every set

Notch reads how fast the weight is moving and picks the load for the set you do next

Setting up over the bar

Work on what is actually lagging

Your lifts show where you are behind, and Notch suggests the exercises that target it

Deadlift lockout, sensor on the chest

Hear what to change as you lift

Feedback in plain words, read out loud, so you fix the movement with the bar still in your hands

Deadlift lockout with the chest sensor

See every lift change over time

RPE, rest and time under tension on every set, from workout to workout and block to block

What the sensors measure on every rep

Range of motion

How far you actually moved, on every rep.

Speed

How fast the weight moved. It drops before you feel tired, so you see fatigue coming.

Time under tension

How long the muscle was working, set by set.

Rep score

More than 150 measurements folded into one answer: was it a good rep.

Here is what a set looks like

The score comes first. If you want to know why, the app tells you in words, and reads it out if your hands are busy.

SquatSet 3 of 4
8 reps, 6 good
Depth and speed dropped on the last 2

The first 6 reps matched your best sets this month. Reps 7 and 8 were shallower and slower. Rest a little longer before the next set.

Watch the rep back

The app rebuilds your movement from the 4 sensors and plays it back, so you can see what the score is based on.

How it works

Put the sensors on, train as usual, and every set comes back with a score and what to change.

Sensor on the chest and upper arm, from the current site.
1

Put them on

4 sensors on soft bands: upper arm, thigh, chest and the back of the hip.

Back squat, from the current site.
2

Train as usual

Barbell, dumbbells, machines or your own weight. The sensors read how you move.

App screenSet summary with the rep score. Real screen from the app.
3

Get a score after the set

Every rep is checked for range of motion, speed and time under tension, and the app tells you whether it was a good rep, what to change, and what weight to use next.

App screenReplay of 1 rep with the 3D figure. Real screen from the app.
4

Go deeper when you want

Voice and text feedback on the set, a replay of the movement, and charts over time.

Backed by peer-reviewed research

Peer-reviewed movement science

The scoring rests on published research into how the body moves under load.

Third generation of the hardware

The sensor has stayed the same shape through 3 generations of the product.

Published in

Scientific ReportsScienceDirectIEEE Xplore Digital LibrarySensors

One price for the Kit and your first year in the app

$400

Shipping is free. After the first year the app continues on a yearly or monthly plan.

4 Notch sensorsUpper arm, thigh, chest and hip
Breathable mesh strapsArm, thigh and hip
Sensor t-shirtHolds the chest sensor through the fabric
Fast charging stationWith USB cord
Carrying pouchFor the sensors and straps
1 year of the appScores, feedback, replay and history
Get the Kit

Before you buy

What comes in the box?+
4 sensors, breathable mesh straps, a t-shirt that holds the chest sensor, a fast charging station with a USB cord, and a pouch to carry it all.
Where do the sensors go?+
Upper arm, thigh, chest and hip. The straps are mesh, and the chest sensor reads through the t-shirt.
Can I use the app without the sensors?+
Yes, with a smaller set of features. The app reminds you to connect them when you are ready.
Does it work on Android?+
Not yet. Today the app is for iPhone.
Does it tell me what weight to lift next?+
Yes. It reads the speed of your reps and recommends the weight for the next set, and suggests exercises to work on.
Can I watch a rep back?+
Yes. Every set gets a 3D replay, with the scores and charts behind it.
What happens after the first year?+
The app continues on a yearly or monthly plan.
What does shipping cost?+
Nothing. Shipping is free.

Notch scores every rep you do

$400 for the Kit, first year of the app included.

Get the KitDownload app