Cusp: Perimenopause Tracker

Your labs are normal. Your doctor said so. But something is happening, and it has been for months.

Ember is a perimenopause symptom tracker built around one idea: make the chaos legible. Log how you feel in 30 seconds a day. After two weeks, Ember turns those logs into a monthly heat map - 80 symptoms, every day, intensity-coded from barely-noticed to can't-function. Then you show it to your doctor instead of trying to explain it.

THE DOCTOR CARD
Every existing perimenopause app lets you log. None of them turn the log into something you can hand to a clinician. Ember does.

Tap "Doctor Card" and Ember renders a 1080×1920 shareable image: your symptom grid for the month, your top three symptoms by frequency and severity, the days when three or more symptoms hit hard at the same time, and an automatically generated pattern note. Save it to Photos or share directly to your provider via iMessage, WhatsApp, or your patient portal.

Pro unlocks PDF export - a clean, clinic-printable version your doctor can file.

DOCTOR BRIEF (PRO)
Walk into the appointment with the paragraph already drafted. Ember reads your last 30 days (or 3 or 6 months) and writes a plain-English clinical summary - your top concerns, your HRT narrative, and a numbered list of what you'd like to discuss. Toggle between a clinical tone and a warmer conversational one. Share via iMessage or paste directly into your patient portal.

THE HEAT MAP
A grid of every day this month by every symptom you logged, colored by intensity. A cycle-phase band runs above the grid so you can see whether your hot flashes cluster in the luteal phase or your brain fog tracks with the bleed. Ember auto-generates a pattern note - phase clustering, symptom co-occurrence, month-over-month trends - so you do not have to do the analysis yourself.

HRT TRACKING
Add your estradiol patch, progesterone gel, or any other medication. Each day, Ember shows a checkbox on the Today screen - one tap to log it taken. Pro users can see the HRT efficacy view: does your symptom intensity actually move on days you take your medication versus days you miss it? Clinical-grade correlation, on-device, no servers.

LOG 80 SYMPTOMS IN 30 SECONDS
Hot flashes, night sweats, brain fog, joint pain, heart palpitations, electric-shock sensations, rage spikes, low mood, sleep disruption, dry mouth, ear pressure, frozen shoulder, formication, vaginal dryness - and dozens more across 13 categories. Tap to log, hold to set intensity and triggers. Your eight most-used symptoms stay in a quick-access row so most days take less than half a minute.

INSIGHTS
A weekly view shows days logged, peak-intensity days, your top symptom, and your loudest cluster day. A lifetime strip shows total days, streak, months tracked, and symptoms covered. The Spotlight card calls out the month's most active symptom with a sparkline. Constellation View (Pro) traces any single symptom across every month you have ever logged - so you can see whether your joint pain has been improving since you started HRT.

PRIVACY - LOCAL ONLY
Your symptom log lives in a single database file on this device. There is no account. There is no server. There are no analytics SDKs in this app - no Firebase, no Sentry, no Amplitude. We have no way to read what you log, and neither does anyone else. When you generate a Doctor Card, it stays on your phone until you choose to share it.


FREE VS PRO
Free: full symptom logging (all 80), Today screen, heat map for the current and one prior month, one Doctor Card image per calendar month, 14-day backfill.

Pro ($9.99, one-time, lifetime): unlimited Doctor Cards, PDF export for clinic printouts, Doctor Brief with discussion list, HRT efficacy tracking, Constellation View, extended heat map (30 rows), no ads.

One purchase. No subscription. No upsell. Less than one HRT consultation copay.