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Sensors read; the Curve band is the brain that turns them into your continuous curve. Founder bands include your first 4-pack.
Home/Cortisol sensors
This is the 14-day cortisol sensor that powers your Curve, a swappable cartridge that measures cortisol from your sweat for 14 days, then you snap in a fresh one. It's the only part of the Curve that wears out.
Per 4-pack · about 8 weeks of continuous wear · auto-ships before you run out.
Prices shown are target prices and may differ from the final sale price.
No tools, no clinic, no waiting. When a sensor reaches day 14, the app tells you, and the change takes seconds.
The magnetic tray releases the spent sensor with a press. Drop it in the recycling sleeve it came in.
A new sensor clicks into place by magnet. It seats the same way every time, so contact is always right.
The app picks the new sensor up automatically and your curve continues without a gap.
off every 4-pack on subscribe & save, and it ships before you run out.
The only part of Curve that wears out costs less than a coffee a week to replace.Auromone · on the cost of staying continuous
Each sensor carries a thin layer shaped to lock onto cortisol. When cortisol attaches, it shifts a tiny electrical signal, and a second electrode alongside it cleans up the noise, down to very small amounts.
It reads the active cortisol in your sweat, the same kind a lab measures in blood, which is why a Curve reading tracks a blood test closely in our bench testing.
One 4-pack lasts about eight weeks, so a year of continuous cortisol runs roughly six to seven packs. Subscribe & save makes it cheaper and automatic.
Estimated at ~6.5 packs a year of continuous wear. Skip, pause, or cancel a subscription any time.
A fresh 4-pack arrives before your last sensor expires. Your curve never goes dark.
Subscriber pricing is locked in. No codes, no re-ordering, no thinking about it.
Skip a shipment, change the cadence, or cancel from the app in two taps. No phone calls.
Sensors read; the Curve band is the brain that turns them into your continuous curve. Founder bands include your first 4-pack.
The app counts each sensor down and nudges you a day before it expires at 14 days. Swapping takes about ten seconds and your curve continues without a gap.
Sweat carries the same active cortisol as a blood test, the form your body actually responds to. In our bench testing, Curve's readings stayed within about 8% of a lab blood test over 14 days of wear. See how the Curve stacks up against other cortisol wearables and lab tests.
Sealed sensors keep for about 12 months at room temperature. Subscribe & save sends just enough so your spares are always fresh, rather than stockpiling.
Any time, from the app, in two taps. Skip a shipment, stretch the cadence, or cancel outright, no calls and no fees. You keep founder pricing as long as the subscription stays active.
The cortisol sensor fits every Curve band. Testosterone, estradiol, and melatonin arrive as their own sensor modules through 2028, and subscribers get first access to each.
Reserve your Curve and your sensor plan ships with it in Q4 2026. We only charge when it ships, never before.
No deposit. No spam. Leave any time.
Prices shown are target prices and may differ from the final sale price.