pum - endometriosis tracker
period, pain and patterns
Only for iPhone
Free
iPhone
The period and symptom tracker for endometriosis and adenomyosis. Precision-built for the part of your life that affects everything else.
Most period apps are built for the average cycle. pum is built for what your body actually does. For irregular cycles, for cycles that taper or skip or stop, for pelvic pain and painful periods, for the symptoms generic apps don't bother asking about. For the people who want patterns, not averages.
1 in 9 women have endometriosis, and the average diagnostic delay is over 7 years. pum exists for the people living inside those numbers.
NO PAYWALL. NO ACCOUNT. NO ASKS.
Free to download, no subscription required. Logging your first symptom takes under a minute — no fifty-question onboarding, no paywall waiting at the end. Your health data stays on your device. iCloud sync is optional and encrypted. No ads, no data selling, no third-party sharing. pum sends only anonymous crash and usage diagnostics — never your health data, never linked to you.
LOG WHAT MATTERS
• pain — pelvic pain, cramps, by location, intensity, duration
• bleeding, spotting, clots
• GI symptoms, bowel movements, bloating, nausea
• sex, medications, caffeine, nicotine
• fatigue and mood — quick morning and evening check-ins
• surgery, scans, diagnoses, doctor visits — all in one place
Logging is built to take five seconds. No friction between you and your data.
SEE THE PATTERNS
pum's analysis engine finds the relationships your symptoms hide. How sleep relates to pain. How cycle phase relates to a flare. How things look before and after a treatment change. Statistical, n-of-1, inspired by case-crossover study designs — your patterns, not population averages. With confidence intervals. Honest when it doesn't have enough data yet.
PREDICTIONS FOR IRREGULAR CYCLES
Bayesian cycle prediction calibrated to your treatment, not a 28-day default. Handles IUDs, hormonal therapy, post-pill irregularity. Tracks phantom cycles during amenorrhea so the app keeps making sense even when periods stop. Your meds, synced to your cycle phase — tranexamic acid before your period, iron during. Set it once.
APPLE WATCH
Your watch is already doing the work. pum reads sleep, HRV, heart rate, and wrist temperature continuously — patterns surface that manual logging can't catch.
APPLE HEALTH
Import your cycle history, exercise, and sleep data to seed predictions on day one. pum doesn't need months of new logging to start being useful.
YOUR DATA, YOUR AI
pum has no chatbot, no AI middleman. Instead, it exports your data in a paste-ready format for the AI of your choice — Claude, ChatGPT, Gemini, whoever. Ask what changed before a flare. Compare difficult weeks to your baseline. Build custom infographics. Get a second opinion. Sanity-check what a clinician told you. You drive the conversation.
BUILT ON THE RESEARCH
pum's analysis is calibrated to clinical evidence on what actually modulates endo symptoms — sleep, cycle phase, exercise, medication. Each thing we ask you to log earns its place by the research.
BUILT FOR ONE, FIRST
pum was built by a solo developer with a mathematics background, for one woman with stage 4 endometriosis — on the bet that what genuinely helps one person with endo will help others. It's new to the App Store, shipping improvements almost daily, and shaped directly by the people who use it.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Pum now has a feedback line built in. open your You page, tap feedback, and say what's working, what isn't, or what you wish pum did. it's anonymous unless you add an email for a reply. Every message is read by the person who builds pum.
Also in this update: the first time pum opens after an App Store install, it sends one anonymous "opened" signal, so we know how many downloads become real users. No health data, no identifier, just a count. The privacy policy at pum.me covers it in full.
The developer, Lewis Thompson, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Lewis Thompson
- Size
- 14.3 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 18.2 or later.
- iPhone
Requires iOS 18.2 or later.
- iPhone
- Languages
- English
- Age Rating
13+
- 13+
- Infrequent
Medical Treatment information
- Copyright
- © 2026 Lewis Thompson