On this device · English first · Local care numbers

Understand what is changing.

Perimenopause and menopause can change sleep, temperature, mood, cycles, energy and concentration — often before the pattern is obvious. Surgical and medically induced menopause are part of the same companion.

Meridian keeps a private record on your device, compares today with your own baseline, and turns months of change into one page you can take to a clinician.

No menopause score. No diagnosis. No prescription engine.

“Something is happening to my body and I don’t understand it.”

That is the first question. The product is the years after it.
01 / See it

People need to see what they get.

PATTERN CARDNOT A STAGE

A working picture. Not a label you picked.

Age band45–49
CyclesIrregular
OvariesIntact
PathwayPerimenopause-like picture
NextKeep a Map · mention sleep
Anonymous check. No account. Not a diagnosis.
CONSULTATION PACKONE PAGE

What changed, in her words.

Most disruptiveSleep · heat · joints
What she triedAlcohol off weeknights
Device (later)Sleep −51m vs baseline
To discussSleep, options, bleeding rules
Printed from the device. Observed association, not cause.
Context

The population is large. The tools are thin.

26%
of all women and girls globally were aged 50+ in 2021, up from 22% a decade earlier.
WHO menopause fact sheet
45–55
is when most women reach natural menopause. Perimenopause can run for years before that.
WHO
3 / 20
menopause apps in a 2025 review were judged to have an evidence base. Most are diaries with articles.
Peer-reviewed app review, 2025
$1.8B
estimated annual U.S. lost work time tied to menopause symptoms — a Work problem, not only a clinic one.
Mayo Clinic Proceedings, 2023

Context for why a multi-year record matters. Not a market forecast.

00b / Pass along

A line meant to be forwarded, not posted with a sunrise.

Meridian

An AI that understands your menopause journey before you know you’re in it.

Private by default. Personal over time. One page for the doctor. No score pretending to be a diagnosis.

Send this to someone who is 43 and tired of guessing

The Pattern Card takes two minutes and does not ask her to self-label a stage. If that is all she ever uses, it is still more honest than a quiz that ends in “buy our vitamins.”

Open the Pattern Card

01 / Need

A two-week diary is a snapshot. This decade is not.

Perimenopause can last several years. Most clinic visits last minutes. Existing apps already count hot flashes. Almost none hold a longitudinal picture, an evidence spine, and a page a clinician can actually use.

In otherwise healthy people 45 and over, the picture is often clinical. Meridian does not invent a blood-test score to look more medical than it is.

02 / Product

Four pieces. One companion.

Usual appMeridian
Opening moveLog a hot flash“What is happening to me, and what next?”
MemoryA calendarA twin that compares today with her own baseline
ClinicA PDF of ticksOne page: change, experiments, what to discuss
ModelChat that has not read her yearRules first. Optional model last, and only the fields she ticks
BusinessAds beside adviceNo pharmaceutical pitch inside the engine
01

Pattern Card

Anonymous. Facts in, a working picture out. No self-selected “stage.” Under 40 is a different pathway. Pregnancy is checked before peri is discussed.

02

Map

The on-device diary. Clusters, change against your baseline, experiments marked as hypotheses. Sequence matters more than a single bad night.

03

Companion

Safety Brain first — sliders never invent emergencies. Evidence cards second. An advanced model is planned later, behind a consent sheet. It is not on today.

04

Consultation pack

One printed page. The weekly reason to open Meridian. Built so a twelve-minute visit starts with the year, not the parking lot.

03 / Signals

The diary is how you felt. The device is what happened around it.

Meridian Signals is not “import your watch.” It is a second observational layer under the diary. Your own symptoms stay primary. If the ring says the night was good and you say it was terrible, both stay on the record.

A website cannot read HealthKit or Health Connect. Those need a thin native shell and a MeridianHealthBridge. The PWA stays. The first wearable feature is sleep around nights you already marked — not a hot-flash detector, not an HRV menopause biomarker, not a score of 61.

SIGNALS · NIGHT LENSLATER

Last night

YouNight sweats · sleep poor
Device sleep5h 54m · −58m vs baseline
Resting HR67 · +4
Wrist temp+0.31°C vs your baseline
Observed together. Not proof that one caused the other.
W0–1

Bridge

Common schema. Health Connect and HealthKit in native shells. Six fields only.

W2

Night Lens

Subjective + sleep, resting HR, temperature deviation from your baseline.

W3

Watch tap

One tap: hot flash or night sweat. Exact time. Then look around the event.

Never

A detector

No algorithm that “found” a hot flash. No readiness score as ground truth.

04 / Default

Private on purpose, not as a setting buried in a menu.

The diary stays here

AES-GCM vault in this browser. Optional PIN. Core diary: no Meridian account and no Meridian cloud.

Voice is shy

The microphone is off unless the browser can transcribe on-device. There is no silent cloud fallback.

You hold the export

Backup is a file. No PIN means anyone with the file can open it. We say that before you download.

Full privacy note

05 / Now

The first two hundred are diaries, not a waitlist.

English, anywhere. Fourteen days or more. That is the current product.

Meridian is education and self-tracking. It does not diagnose, treat, or prescribe. For chest pain, fainting, soaking-pad bleeding, or thoughts of self-harm, use local emergency or crisis services.