a tracker that gets endo

The app built for endometriosis and adenomyosis.

pum's Today screen: the cycle dial on day 20, luteal phase

Someone I care about had waited years for anyone to take her pain seriously, then months for the specialist appointment. The appointment took minutes.

why a jellyfish

Translucent and beautiful, the jellyfish is subject to currents that feel enveloping and mysterious, and yet navigates the tides with elegance and grace.

log a flare in three taps

Logging is quick, even mid-flare. It asks about the things that matter: where it hurts, how much, what it stopped you doing, and what your bleeding, gut and bladder are doing.

Those are the details pum studies for your patterns, and the ones a doctor asks about.

predictions for cycles that vary

pum learns your cycle from your own history, and every prediction shows its confidence.

a cycle with periods

Bring your history in from Apple Health, or tap your past periods onto a month grid. pum shows the day of your cycle and its phase.

bleeding stopped, still cycling

If treatment stops your bleeding but your body keeps cycling, pum reads your cycle from your temperature, from your watch or a thermometer each morning. It predicts no period.

a paused cycle

When treatment pauses your cycle altogether, pum says so and shows no countdown.

the rhythm under the chaos

pum lays each symptom around your cycle, so you can see where it gathers.

Every pattern says how many of your cycles it rests on. Until there is enough for an honest answer, pum tells you that instead.

pain

Your pain around your cycle: the days it gathers on, and how strong it is there.

and poor sleep

Poor sleep joins as a second ring, so you see whether your worst nights fall in the same part of your cycle.

and low mood

Low mood makes a third. With all three together, you know which part of your cycle to plan around.

every cycle, side by side

Every cycle sits in its own row, lined up by cycle day, so you can hold this one against the last.

pain, every cycle

A symptom that comes a few days earlier each cycle shows up as a slant down the rows.

poor sleep, every cycle

Each symptom gets its own rows. Set out cycle by cycle, poor sleep shows whether your bad nights keep to the same days.

see what's changing

After an IUD, pum sets your pain before it against your pain since.

Lately sets your last six weeks against up to eight before them, for pain, energy and mood.

a report for your doctor

A printable record of your symptoms, laid out to the endometriosis guideline your doctor works from: NICE in the UK, RANZCOG in Australia, ESHRE in Europe.

It holds counts and your own words, on A4 or US Letter. It is free, and pum keeps no copy.

reminders that move with your cycle

Pin a reminder to cycle days once, like tranexamic acid on days 1 to 3. When your cycle moves, the reminder moves with it.

Take, snooze or skip from the notification, and pum keeps the record.

bring your own AI

There is no chatbot inside pum. It packages your data for the AI you already use, ready to paste into ChatGPT, Claude or Gemini.

Ask what changed before a flare, or what to raise at your next appointment. You lead the conversation.

endo is different in every body. pum studies yours.

n = 1

Every comparison runs on your logs alone, never on an average of other people.

phase

Your cycle phase is accounted for, so a pattern is never just your period showing up.

Each pattern says how sure pum is, and how many cycles it rests on.

the science
no accountOpen pum and log. There is no sign-up and no paywall.
on your phoneYour log lives on your iPhone. iCloud sync stays off until you turn it on.
nothing to sellNo pum server holds your health data. How privacy works.
coming soon

circle, for the people who love you

A companion app for a partner, a friend or family. You choose what they can see, and they see how you're doing without you having to explain.

Circle will be part of pum premium. Logging, patterns, reminders and the report stay free.

about circle

an update most weeks

See what shipped, what is being built, and what comes next.

the roadmap
  1. a report for your doctor
  2. your symptoms around your cycle
  3. did the painkiller help?
  4. patterns that find you

things you might want to know

is it really free?

Yes. Logging, predictions, patterns, reminders, Apple Health, the doctor's report and the AI export are free. There is no paywall at the end of onboarding. Circle, the companion app for the people who love you, will be part of pum premium.

where does my data live?

On your iPhone, and by default nowhere else. pum needs no account, and no pum server holds your health data. iCloud sync is off until you turn it on. The full picture is here.

do I need an Apple Watch?

No. pum works fully without one. A watch adds sleep and wrist temperature on its own. Without one, you can log bedtimes and a morning temperature by hand.

my cycle is irregular, or I don't bleed at all. does pum still work?

Yes. pum is built for cycles that vary, skip, and change with treatment. If your period is paused by a hormonal IUD, the pill or surgery, pum shows no countdown. Where your body still cycles, pum can read your position from temperature instead.

is pum diagnosing me?

No. pum is not a medical device, and it does not diagnose or give medical advice. It finds patterns in what you log, and you decide what to do with them. Its symptom fields follow the NICE guideline for endometriosis, so what you log is what a clinician assesses.

iPhone only?

Yes. Apple Health, Apple Watch and on-device storage carry a lot of the work. No Android version is planned right now.

so what's the catch?

pum cannot sell what it never receives. One developer builds it, and it will make money from a paid companion app, Circle, and never from your data.

built for you

Free on iPhone. No account required.

Download on the App Store