Turning everyday actions

into hormonal insights.

The first passive, non-invasive hormone tracker. Giving you clinical-grade testing from the comfort of your home.

What is Cayla?

Cayla is the first truly passive, long term hormone tracker delivering precise, actionable insights on your hormonal health - whether you're trying to conceive or navigating menopause.

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By tracking the four most important hormones in your urine, it maps your full cycle and gives personalised insights depending on your journey, so you can make informed decisions sooner.
All while being optimised for passivity.

Complete passivity.

With a collection system designed specifically for women, Cayla automatically senses and collects your urine for testing. No more peeing on sticks or getting your hands dirty.

Totally non-invasive.

Cayla is built to be out of the way and out of mind. Sitting on the side of your toilet, we take measurements from your daily bathroom activities, so that you don't have to lift a finger.

Automatic collection.

With the collection plate ideally located for women, our smart grooves guide your urine for testing. Temperature sensors activate this process, so we know exactly when to start collecting.

Scanning.

The device then measures your 4 key hormones, LH, FSH, E2 and P4, which we then interpret to give you a complete picture of your menstrual health.

In built cleaning.

After every scan, Cayla passes a small amount of cleaning solution back through the device, replenishing the sensors and cleaning the tubing.

Refillable Sensing Pods.

The sensing technology and cleaning solution are contained within refillable pods. With each pod containing enough to last 90 readings, thats enough for 3 months of daily reading*.

Detachable Battery.

When the product needs a recharge, we'll let you know via the app. The battery is USB-C rechargeable, so that you can get it back up and running without a hassle.

Designed for shared use.

The device can identify different users by the proximity of their phone, meaning Cayla works for multiple women in the home. If we happen to get it wrong, you can easily reassign readings in the app.

Know where you are at a glance

Instant information presented to you in a digestible manner. Your four key hormones - LH, E2, P4 and FSH - are tracked automatically every single morning without any action from you.

Real time tracking

Instead of a one off blood test showing a single moment in time, Cayla builds a rolling 3 month hormone map that reveals your true patterns each day.

The long term context

View your cycle history, carefully analysed by machine learning algorithms to identify irregularities and draw patterns synthesised into a one-page clinical summary, turning vague symptoms into structured, objective evidence your GP can act on.

Device control on the go

Monitor your device's battery life, aptamer and cleaning solution pod levels from your phone so you know when to replenish.

Multiple users?
Not a problem

Even though we’ve designed Cayla to passively assign readings, mistakes can happen. In this case, you can easily reassign readings in the app.

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Smart technology
means

zero effort for you.

Cayla works passively to track all four key hormones using cutting edge aptamer technology. No daily effort—just continuous monitoring that syncs to your phone via Bluetooth. Learn more about the technology and see exactly how Cayla fits seamlessly into your life.

How it works

How can Cayla help you?

Trying to Conceive

Know your fertile window, don't guess it

Stop peeing on test strips and hoping you've timed it right. Cayla detects your LH surge in real-time, confirms ovulation with progesterone tracking, and pinpoints your fertile window with precision—so that trying does't feel like a second job.

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Menopause

Built for clarity, designed for your transition

Cayla tracks rising FSH, estrogen fluctuations, and cycle changes in real-time—giving you the data to understand where you are in your menopausal journey and the evidence to get the care you deserve.

Learn more

Bringing Passivity
to hormonal tracking.

Meet the team

*based on one user, using the device once a day.

Frequently Asked Questions

Cayla sits in your toilet and passively analyses your urine each time you use it. It continuously measures key hormones and sends insights to the app — no strips, no timers, no effort.

Cayla tracks LH, FSH, oestrogen, and progesterone — the four hormones that govern your entire cycle, from follicle development through to ovulation confirmation.

By tracking multiple hormones continuously, Cayla builds a personalised model of your cycle. This gives a more complete and accurate picture than single-hormone tests or calendar methods.

No. Cayla works passively every time you use the toilet. There are no test strips to dip, no alarms to set, and no samples to collect manually.

Yes, after each scan, Cayla runs a small amount of cleaning solution through the system to refresh sensors and keep tubing clean.

Yes. The Cayla app supports multiple profiles, so more than one person can track their cycle using the same device.

Cayla is designed to fit most standard toilets. If you have a non-standard setup (very tight spacing, unusual bowl shape), we'll guide you during onboarding with a quick fit check.

That's okay. Cayla works best with regular readings but missing days won't break your insights, your trend map updates as soon as new data comes in.

Your readings are your data. We use personal information only to provide your insights, operate the service and improve the product experience. Cayla is being built with secure data storage, controlled access and clear retention practices and our full privacy policy will be published before launch.