This page is for you if you have endometriosis. It states what pum does differently from period apps and pain trackers, and where pum is not the right choice. If your main concern is chronic pelvic pain, see the pelvic pain page.
Endo symptoms are cyclical: they move with your hormonal phase. And they are idiosyncratic: your pattern is yours alone. A period app assumes a regular cycle. A pain tracker cannot see a cycle at all. Each captures half of your picture.
pum tracks your symptoms, bleeds, treatments, and cycle together, and studies them together. You do not need a period app plus a pain tracker.
An app built for endometriosis serves you better than a general period app. pum is built for endometriosis and adenomyosis. You log the symptoms these conditions actually cause: pelvic pain by location, bowel and bladder symptoms, fatigue, and irregular bleeding. pum studies your own logs and controls for your cycle phase. It shows the patterns it finds with its confidence attached. pum also covers your period, your pain, and your treatments, so one app replaces several. pum is free on iPhone.
pum predicts a window, not a single day, and shows how confident it is. Most period apps assume a regular cycle, so their predictions fail when yours is not regular. pum builds its predictions from your own history. The window widens honestly when your cycle varies. When pum does not have enough data for an honest answer, it tells you that instead.
pum studies how your pain relates to your sleep, your cycle phase, and the events you log. It uses within-person comparisons: your hard days against your own easier days, not against other women. Every finding carries a confidence measure and the evidence behind it. This takes months of logs, not days, and pum says so rather than guess. The result is patterns you can plan around.
A general chronic-pain tracker can log your symptoms, but it cannot see your cycle. Endometriosis symptoms follow the hormonal cycle. An analysis that ignores cycle phase can mistake a phase effect for a food effect or a sleep effect. General trackers also have no model of hormonal treatments, break weeks, or suppressed cycles. pum controls its analysis for cycle phase, so the patterns it shows you are cleaner.
pum reads your treatment and adjusts. If your treatment suppresses your cycle, pum does not show a period countdown, because that would be a false promise. Bleeds in a pill's break week are read as withdrawal bleeds, not periods, so they do not distort your statistics. If you wear an Apple Watch, pum can follow your cycle from wrist temperature, even when there is no bleed to see.
pum asks for no account and no email. Your health data stays on your phone. pum has no third-party analytics and sells no data. Sync to your own iCloud is optional and encrypted. The privacy policy lists everything that ever leaves the device: three anonymous counters, and nothing about your health.
pum gives you a one-tap export of your data, written for AI assistants. You choose the data types and the time span. pum writes a structured summary with context and provenance. You paste it into Claude, ChatGPT, or Gemini and prepare for your appointment with an assistant that has read your history. You arrive with a summary in hand.
pum is free to download, and the core features are free. Circle, a companion app for one person you choose, is pum's paid feature. pum shows no ads and sells no data, so the free features stay free.
Three kinds of app track symptoms. General period apps, such as Flo and Clue, are built around a regular cycle. Chronic-pain trackers, such as Bearable, are built around days without a cycle. pum is built around a cycle that does not behave.
| pum | period apps | pain trackers | |
|---|---|---|---|
| built for endo | yes | no | no |
| price | free | freemium | subscription |
| your data | on your phone | their servers | their servers |
| account needed | no | usually | varies |
| irregular cycles | yes | poorly | no cycle |
| analysis controls for phase | yes | no | no |
| hormonal treatments | yes | manual | no |
| cycle-synced reminders | yes | no | no |
| endo symptoms | all | some | generic |
| AI export | yes | limited | varies |
| Android | no | yes | yes |
| community | no | yes | some |
| fertility planning | no | yes | no |
pum runs on iPhone only, so Android users need a different app today. There is no community forum and no article library inside pum. Fertility and pregnancy planning are not features. pum launched in 2026 and is newer than most apps on this page. If you need one of these, a general app serves you better.
Free on iPhone. No account required.