There isn’t one app that does everything PCOS asks of you, so pick by what you want to follow. For your periods on iPhone, we’d pick Plum, which we make. It predicts from your recent cycles, shows how much they vary, and logs a day in a tap or two. Clue lets you hide an odd cycle and log your weight. Bearable tracks medication, supplements and triggers. PCOS Polly is built around PCOS meals and habits. No app can diagnose PCOS or tell you when you ovulate from dates alone.
How we chose
We make Plum, and it’s on this list. There are no affiliate links. We read each company’s own pages and App Store listings on October 15, 2026, and every claim about another app links to its source below. Where a page didn’t say something, we say “not stated”.
PCOS changes what a tracker needs to do. Cycles are often long and uneven, ovulation can be late or missing, and the symptoms that matter go past cramps. So we asked four things. Does the forecast cope with long, uneven cycles? Can you log skin, hair and spotting? Can you log medication? And does the app admit what it doesn’t know?
Plum, for following your periods without the work
Plum is an iPhone app. Until you’ve logged three cycles it predicts with a weighted average. From three on, it uses the median of your last six cycle lengths, so one strange month barely shifts it. When your recent cycles vary by more than about five days, it switches to the median of the last three, so the date follows where your cycle is now. Insights shows how much your cycles vary, as plus or minus a number of days. The day after a predicted start, the home screen tells you your period is a day late, and it keeps counting.
If a cycle runs more than a week past your usual length, Plum treats it as a possible missed log and leaves it out of the median. That keeps one forgotten period from stretching every forecast after it. With PCOS it cuts the other way too, because a real 60-day cycle moves the forecast less than you might expect.
Logging takes a tap or two, across 27 things. The ones that matter most with PCOS are spotting, skin (including breakouts and oiliness), hair (including shedding), pain, mood, energy, sleep and cravings. You can also log ovulation and pregnancy tests. A logged ovulation test is kept on the day, but it doesn’t change Plum’s ovulation estimate, which comes from your period forecast. Plum doesn’t log weight, temperature, supplements or medication other than the pill, and it doesn’t sync with Apple Health.
Logging, predictions and reminders come with the app at no cost. Premium adds insights. Plum has no ads, nothing under Data Used to Track You on its App Store privacy label, and no Android version. Our guide to tracking your period with PCOS covers what to log and what to do with the record.
Clue, for hiding an odd cycle and logging weight
Clue runs on iPhone and Android. Its PCOS member story lists what you can track, including bleeding, skin changes such as acne, weight, digestion, pain, energy and mood. If you have a diagnosis, you can record it in the app’s My Health Record. Clue’s help centre explains how to hide an atypical cycle from its predictions, from the Analysis tab. It names pregnancy, miscarriage, emergency contraception and skipping a period on the pill as reasons to. Its predictions page says a positive ovulation test or temperature data can change its ovulation estimate. Whether hiding a cycle needs Clue Plus is not stated on that page.
Bearable, for medication, supplements and triggers
Bearable is a symptom tracker, not a period app. Its listing says its cycle feature shows how symptoms, pain and mood change across each phase, and that it’s useful for PCOS. You can log medication, supplements and treatments, and sync steps, sleep and heart rate from Apple Health and Fitbit. It’s free to download with paid upgrades. Its privacy label lists contact info and identifiers under Data Used to Track You. It’s on iPhone.
PCOS Polly, for meals and habits built around PCOS
PCOS Polly is made for people with PCOS. Its listing says you log meals, symptoms, your period and habits such as supplements, sleep and exercise, and it has a meal planner with PCOS recipes. It’s upfront that symptom logging, habit tracking, insights, reminders and recipes all need a subscription. Only the setup is free. It’s on iPhone and iPad.
Apple Cycle Tracking, for a built-in warning
Cycle Tracking in the iPhone Health app can send a Cycle Deviation notification when your logs show irregular, infrequent or prolonged periods or persistent spotting. Apple says these may point to an underlying condition or to other factors, and the Health app suggests what to do next. You can export your cycle history as a PDF for an appointment. It costs nothing and is already on your iPhone.
Side by side
| Long or uneven cycles | Skin and hair | Medication and supplements | Runs on | Cost | |
|---|---|---|---|---|---|
| Plum | Median of recent cycles, variation in days, a cycle over a week late left out | Yes | The pill only | iPhone | Predictions at no cost, Premium for insights |
| Clue | Hide an atypical cycle yourself | Skin yes, hair not stated | Not stated | iPhone, Android | Free version, Clue Plus for more |
| Bearable | Not stated | Not stated | Yes | iPhone | Free download, paid upgrades |
| PCOS Polly | Not stated | Not stated | Supplements | iPhone, iPad | Subscription for nearly everything |
| Apple Cycle Tracking | Cycle Deviation notifications | Not stated | Not stated | iPhone, Apple Watch | Built in |
One app or two
You may end up using two. A period app keeps the dates and the day-to-day symptoms, and something like Bearable keeps the medication and supplements. That’s more work, so only do it if the second app answers a question you have. If all you want is to know roughly when your next period is coming and to have a record for your clinician, one period app is enough.
What a tracker can’t do
It can’t diagnose PCOS. That takes a clinician, usually with blood tests and sometimes an ultrasound. And it can’t find your fertile window from dates when ovulation is irregular, so don’t use any of these apps as birth control. See a clinician if your cycles are often longer than 35 days, if your periods stop for three months and you’re not pregnant, or if you’re trying to conceive and your cycles are irregular. Bring a few months of logged dates. Our irregular periods comparison and the irregular period calculator can help you read what you’ve logged.
Sources
- Plum Period Tracker & Diary on the App Store
- Clue, How tracking with Clue helped Brianna advocate for a PCOS diagnosis
- Clue, How are my predictions and averages calculated?
- Clue, What if an atypical cycle is making my Clue predictions inaccurate?
- Bearable on the App Store
- PCOS Polly on the App Store
- Apple, View menstrual cycle predictions and history in Health on iPhone
- Drip FAQ
