The daily check-in
Thirty seconds across the symptoms that show up: hot flashes, sleep, mood, brain fog, joints. Add your own, hide what isn’t yours.
Move through it, knowingly.
A companion for the perimenopause years. Track what’s shifting, understand what it means, and meet the change on steady ground.
Join the waitlist
iOS first · free to join
No. 01 The flagship
The report your doctor actually reads.
One tap turns months of check-ins into a single clinical page: top symptoms, cycle stats, and the questions worth asking. Built for a 30-second read in the exam room.
†Generated on your device. Nothing is uploaded.
FennaPatient summary
Mar 28 – Jun 26, 2026 · 90 days tracked
Hot flashes18 days / moTrending up, 4–6pm
Sleep disruption14 nightsWaking near 3am
Brain fog9 daysClusters with poor sleep
Cycle length38–52 daysLonger, variable
Self-tracked with Fenna. A starting point for your conversation, not a diagnosis.
Fig. 2 — one clinical page. Top symptoms, cycle stats, the questions worth asking.
No. 02 See your own patterns
Find out if it’s actually working.
Started hormone therapy six weeks ago? Fenna shows you whether your hot flashes are genuinely down, with honest patterns drawn from your own days. No predictions, no cycle math pretending to be certain.
†Your data, your trial. The proof is in your own numbers.
−41%
hot flashes, six weeks
+1.4h
sleep per night
No. 03 The appointment coach
Walk in ready.
Walk out heard.
Twelve minutes shouldn’t decide everything. Fenna turns months of tracking into a doctor-ready brief, then coaches you on exactly what to ask — so you’re taken seriously the first time.
- Months of tracking, distilled to one clear page.
- The right questions, ready before you sit down.
Your visit brief90-day view
Three things worth raising
Hot flashesClustering 4–6pm, most days this month.18 days
Night wakingWaking near 3am, then unable to settle.14 nights
A 9-day bleedStands out against your recent pattern.Longest in 6 mo
Questions to ask
- Could we check ferritin and thyroid?
- Is hormone therapy an option for me?
- What would you want to rule out first?
If it feels rushed — “I’ve been tracking this for 90 days. Can we look at it together?”
No. 04 What it does
More than a tracker.
Logging, not journaling
Tap what you feel. A few seconds a day is all Fenna needs to surface the pattern underneath — so the days you’d rather forget still count for something.
4taps to log a day, on average
Your body keeps a schedule
What feels random rarely is. Map a few weeks and the shape appears — like hot flashes that gather in the late afternoon, not the morning.
Fig. 4 — 38 hot flashes logged; the 4–6pm window stands out.
Yours cluster between 4 and 6pm. Caffeine before noon may be the lever.
Irregular isn’t random
Cycles stretch and shorten through perimenopause. Fenna lays them end to end so the drift becomes a line you can actually read, not a worry you carry.
29 · Mar
34 · Apr
26 · May
41 · Jun
Ranged 26–41 days this season — longer, variable cycles are typical now.
Learn as you go
Plain-English perimenopause education that adapts to what you’re tracking. Answers when you need them, not a wall of articles.
Works fully offline
Everything runs on your phone. No signal, no account, no server to wait on. Your history is always there.
No. 05 Why we built it
Because the existing apps fail you.
Period trackers were built for cycles that are regular. Perimenopause is defined by cycles that aren’t. The category has a documented history of settling with regulators over sharing health data with advertisers — so you’re right to be wary. And you’ve been underserved at both ends of the market: the consumer apps trivialise it, the clinical tools never reach you.
Fenna is for you if you want the truth about what’s happening in your body, and you want to walk into the doctor’s office with evidence instead of anecdote.
Direct. Empowering. Never coddling.
No. 06 Privacy
Yours alone.
We mean it.
Your data lives on your phone — not on our servers, because there are none. Encrypted local storage and optional passphrase-protected backups ship with the app: a key only you hold, so we couldn’t read your data if we wanted to, and we don’t want to.
On your device, not our serversground level
No accountnothing to sign up for
No telemetry in the appwe can’t see you
No trackers in the appnothing follows you
Optional encrypted backupa key only you hold
Fig. 5 — the strata. Like the mark: layered earth, steady ground.
No. 07 Learn as you go
The answers, in plain English.
Getting started
Is this normal at 43?
Perimenopause can begin in your late thirties and run for years. The timeline is yours, and irregular is the norm. Fenna shows you your own pattern, so “normal” stops being a guess.
Sleep
Why am I awake at 3am?
Shifting hormones disrupt sleep and temperature long before periods stop. Track it for a few weeks and what’s driving it — and what actually helps — starts to show.
Patterns
Is it hormones, or something else?
Only a trend over time can separate the two. Fenna turns scattered days into a clear picture you and your doctor can read together.
Support
Do I have to figure this out alone?
No. Fenna explains what you’re seeing in plain English, right when the question comes up — not buried in a forum thread or a fifty-page PDF.
Meet the change on steady ground.
Fenna opens on iPhone soon. Join the waitlist for first access.
Coming soon
Be the first to know.
Fenna is in early testing now, with launch coming to iPhone and Android. Join the waitlist and we’ll tell you the moment it’s live. One message, nothing else.
Join the waitlistiOS first · free to join