Your watch.
Now smarter.

A discreet smart patch designed to sit beneath your watch and bring health and activity insights to your phone.

Reserve at $99.99 See how it works

$129.99 planned retail / $99.99 on the pre-order list

Scroll to explore

Wristly patchDesigned to collect health and activity data from your skin.

01 / Two faces

One slim patch.
Two surfaces.

Watch-facing side Rests against the caseback of your watch.
Skin-facing side The sensing surface that touches your wrist.

02 / Your watch

It starts with the watch
you already own.

Wristly is designed to sit beneath it, against the caseback. Nothing on the dial changes.

03 / In place

Hidden beneath.
Sensing side out.

The patch sits flush with the caseback, its sensing surface facing your wrist.

04 / Contact

Watch. Wristly. Skin.

Worn, the patch is held between your watch and your wrist, where sensing happens.

Watch
Wristly
Skin

05 / Everyday

Worn as always.
Seen only by you.

Your watch looks exactly as it did. The insights are planned to live in a companion app.

Today9:41
62bpm resting
Sleep7h 12m
HRV48 ms
Activity6,420 steps

App concept, illustrative data

What Wristly is designed to do

Keep the watch. Add the insight.

01

Keep the watch you love

Wristly is being designed to work with a traditional watch you already own, so the dial, the case and the feel on your wrist stay exactly as they are.

02

Sense from the skin

The patch is intended to sit between the caseback and your wrist, with its sensing surface in contact with the skin, where readings are taken.

03

See it on your phone

No screen on the wrist. The plan is a quiet companion app that turns what the patch records into readable daily insights.

Planned insights / pending validation

  • Heart rate
  • Sleep
  • HRV
  • Blood oxygen
  • Stress
  • Activity
  • Cycle tracking

Capabilities are intended and under development. They will be confirmed with real samples before launch. Wristly is not a medical device.

What we know so far / to be verified on samples

The details, plainly.

Sensing
An optical heart-rate sensor on the skin side, and a motion sensor.
Insights
Heart rate, sleep, HRV, blood oxygen, stress, activity with sport modes, cycle recording and prediction.
Charging
Wireless, on a small dock. Stated 5 to 7 days of typical use; we will publish what we measure.
Water
Made for sweat, hand-washing and rain. Not for swimming.
Connection
Bluetooth to the companion app on iOS and Android.
Purpose
Personal insight, never diagnosis. Wristly is not a medical device.

Companion app / concept

Readable in a glance. Yours alone.

Today, sleep and cycle: a few views we are designing toward. Everything shown is illustrative while the hardware is validated.

Today9:41
62bpm resting
Sleep7h 12m
HRV48 ms
Activity6,420 steps
Sleep7:20
7h 12mlast night
Fell asleep23:48
Woke07:03
Resting HR54 bpm
Cycle8:10
Day 9of 28
Next periodin 19 days
Ovulationaround day 14
Resting HR58 bpm

App concept / illustrative data

Design philosophy

Invisible technology.
Visible craftsmanship.

A good watch is already finished. Our job is to add something without taking anything away: no screen, no glow, no new habit to learn.

Discreet
Designed to disappear beneath the caseback. If you notice it, we have more work to do.
Honest
We publish what is confirmed and label what is still a plan. No invented numbers, no medical claims.
Yours
Your readings are meant for you. The intended model has no subscription and no reselling of data.

Questions

What we know, and what we are still confirming.

What is Wristly?

Wristly is a screenless smart patch in development. It is designed to attach to the underside of a traditional watch you already own and to send health and activity insights to a companion phone app.

Where exactly does it sit?

Between the caseback of your watch and your wrist. The watch-facing side rests against the caseback; the skin-facing side is the sensing surface and touches your skin.

Will it fit my watch?

Compatibility, dimensions and the attachment method are still being confirmed with samples. We are not promising universal fit, and we will not claim mark-free attachment until we have tested it. Waitlist members will be the first to see the compatibility list.

What will it track?

The planned insights are heart rate, sleep, HRV, blood oxygen, stress, activity with sport modes, and menstrual cycle recording and prediction. Each one is validated on real samples before we call it a feature. Wristly is not a medical device.

Is it waterproof?

It is designed for sweat, hand-washing and rain, not for swimming or showers. We will confirm this on samples before launch.

What about battery life and charging?

It charges wirelessly on a small dock in the box. The stated figure is 5 to 7 days of typical use; we will publish what we measure on samples, not the estimate.

Is there an app?

A companion app is in development. The screens on this page are a concept with illustrative data. Availability for iOS and Android will be confirmed closer to launch.

Is there a subscription?

The intended model is a one-time purchase with no subscription. We will confirm this when pricing is announced.

What does it cost, and when does it ship?

The planned retail price is $129.99. Everyone on the pre-order list gets it for $99.99. We are targeting first shipments in December 2026; the exact date is confirmed once production samples pass our tests, and list members hear first.

Is this a real pre-order? Do I pay now?

You pay nothing today. Joining the list locks the $99.99 pre-order price to your email. When units are ready we send you a checkout link, and you decide then. No obligation, and you can leave the list at any time.

How is my data handled?

The intention is that your readings are yours. We do not plan to sell personal data. A full privacy policy will be published before any device ships.

Pre-order list

Reserve yours at the pre-order price.

Planned retail$129.99
Pre-order list$99.99
Target shippingDecember 2026
TodayNo payment

Join the list and the $99.99 price is yours when the first units ship. We email you a checkout link when it is ready; you decide then, and you can leave the list at any time.

Pre-order pricing applies to everyone on the list before launch. The shipping target is confirmed once production samples pass our tests. By joining you agree to receive occasional emails about Wristly; unsubscribe with one click.