Tape it on
A thin strip down your back. Takes 30 seconds.
✓ Used by doctors
✓ Measures movement, not posture
✓ Shows your physio which part of your back is stuck
✓ Goes on in 30 seconds
✓ Sits flat and invisible under a shirt
✓ 30-day returns
from 362 reviews
1,000+
units shipped
Wear it all day
Measures your back as you actually use it, not how it performs at a check-up.
Check it weekly
One day means nothing. Week three against week one is where you see it.
Back pain changes how you move, often without you noticing. Curv tracks the four changes researchers, MDs, and physios measure.
How freely you move
People with back pain take around 40% longer to bend forward. A change in speed shows whether you’re moving more easily or more cautiously, and people often speed up before the pain eases.
You’ll see: your speed against day 1.
SAMPLE
Recorded time
1.2 h
Movement range
24°
Average speed
11.0°/s
From starting baseline
+0°
How the shape of your back changes through the day
Your back doesn’t hold one shape. It rounds when you sit and straightens when you stand. Curv tracks how that shape shifts from morning to night, so you can see which parts of your day keep your back bent the longest.
You’ll see: the shape of your back, hour by hour.
How much each section of your back moves
People with back pain bend about 18° less. Curv measures each section separately, so you can see which part is doing the work and which part is stuck.
You’ll see: each section’s range against day 1.
Time bending forward vs arching back
Sitting, driving and looking at your phone all bend you forward. Curv tracks how your day splits between bending forward and arching back, so you can see if one direction is doing all the work.
You’ll see: your forward and back split, day by day.
What you can do with it
Find the parts of your back that aren’t moving enough
Get them moving during and after your day with short daily moves
Pick exercises for the muscles you use too much or too little
See whether your recovery is on track, often before you feel it
One day means nothing. Watch the trend across weeks.
Sources: Laird et al. 2019, Mitchell et al. 2008, Wernli et al. 2020. Screens from the Curv app, showing sample data.
Curv records how your back moves between appointments. Your physio can see the whole week, then decide what to change.
Your physio can:
See how you moved at work, at home and in everyday life
Find the part of your back that isn’t improving
Check if a new exercise changed anything
Plan your next session from real numbers
Pre-order for $99
Next batch ships in November · 30-day returns
CurvMap reads how each part of your back bends as you move, then turns it into a live model you can check on your phone.
A posture tracker
Reads one spot on your upper back
Tells you when you slouch.
CurvMap
Reads the length of your back
Shows how every section moves.
Reads how your back bends
The strip runs along your back and reads how each segment bends through flexion and extension, from top to bottom, not at one spot.
Maps which muscles stretch and shorten
From how each segment bends, CurvMap estimates when the muscles along your spine, down your sides and across your stomach are lengthening or shortening.
Today
Day 1 baseline
Compares you to you
Day 1 sets your baseline. Every day after is measured against it, so your numbers show how you’ve changed since you started.
from 362 reviews
Maya
Desk job, weekend cyclist
“I used to judge progress by how my back felt that day. Seeing the trend made it easier to stick with my exercises.”
Range
112° → 149°
Over 8 weeks
Sam
Desk job, runner
“Seeing my range go up week by week kept me doing the exercises, even on days my back still felt tight. After 6 weeks I was back to running 10k’s.”
Range
109.7° → 151.0°
Over 6 weeks
Matthew
Desk job, travels for work
“Travelling for work, I never knew if I was undoing my physio. Seeing the trend each week showed me I wasn’t.”
Range
106.6° → 145.7°
Over 11 weeks
Pre-order for $99
Next batch ships in November · 30-day returns
Why I built this
Rohan Kotecha
Founder, biomechanical engineer
So I built the thing I wanted: something that measures what my back is actually doing, so I can see it instead of guessing.
Curv won’t fix your back. It’ll tell you whether the thing you’re doing is.
Curv sensor strip and app
Once. Less than two physio sessions.
