In plain terms: Choosing a cycle app with PMOS (formerly PCOS) is personal. This is an honest roundup of six trackers, including our own app, Vera. We say plainly where each one shines, and where a competitor beats us, so you can pick what fits your body and your comfort with privacy.
A 2025 review in JMIR screened 199 PCOS apps and assessed the 15 that met its inclusion criteria, with a mean quality rating of 3.6 out of 5 (JMIR, 2025). Twelve of those 15 were commercially affiliated. That gap is exactly why a plain, honest comparison helps. Below, we look at how six apps handle cycles that vary in length, how much of your whole-body picture they let you log, what each one costs, and where your data lives.
What matters in a tracker when you have PMOS?
Four things matter most: how an app handles cycles that vary in length, how much of your whole body you can log, its privacy model, and how well it helps you prepare for a doctor visit. A 2025 JMIR review of 199 PCOS apps found information quality and engagement scored lowest across the field (JMIR, 2025).
Start with cycle length. A study of over 600,000 cycles put the average at 29.3 days, and the NICHD describes a typical adult range of 21–35 days (npj Digital Medicine, 2019; NICHD). With PMOS, cycles are often longer, so an app that treats a long cycle as ordinary matters. We cover this in our post on long and variable cycles.
PMOS reaches well beyond the ovaries, so logging breadth counts too. The condition touches hormones, metabolism, skin, energy, and mood, which is the whole-body picture we describe here. A good tracker lets you note more than bleeding days, and it helps you prepare for a doctor visit with real data.
Is Flo a good choice for PMOS?
Flo is the most widely used option here and the most full-featured. It’s free with in-app purchases from $1.99 to $59.99 as listed on the App Store (as of July 4, 2026). Flo runs on iOS and Android, with the largest user base and the broadest content library of any app in this roundup (Flo).
Best for: people who want one app across many life stages, and Android users.
Cycle handling: Flo is built for cycles that vary in length, and its listing describes ovulation and fertile-window predictions. You don’t need predictions to benefit from tracking, so treat that as Flo’s own feature, not a requirement.
Logging breadth: Flo logs 70+ symptoms and moods, basal body temperature, a week-by-week pregnancy mode, and perimenopause tracking with a “Perimenopause Score.”
Privacy: Flo uses the cloud with an account by default, and its App Privacy label lists health data among data linked to you, and separately lists purchases, location, identifiers, and usage data as data used to track you. Flo also offers an Anonymous Mode that decouples your name, email, and technical identifiers from health data (Flo).
Genuine strength over Vera: Flo runs on Android, has the largest user base, offers pregnancy and perimenopause modes, ships a big medically-reviewed content library, and adds Anonymous Mode. Flo’s Premium symptom checker “provides educational information on PCOS, endometriosis, and fibroids symptoms”; it’s part of the paid subscription.
Is Clue a good fit for tracking PMOS?
Clue is a polished, research-friendly tracker with deep symptom logging. Clue Plus costs $9.99 per month or $39.99 per year on the App Store (as of July 4, 2026). It runs on iOS, Android, and Apple Watch, and stores data on EU servers under GDPR (Clue; Clue privacy).
Best for: people who want detailed symptom data, wearable integrations, and a clear EU privacy posture.
Cycle handling: Clue’s listing describes “personalized ovulation and fertile window predictions, based on a clinically-validated algorithm.” Again, that’s Clue’s own feature. There’s no PCOS-specific feature named on its US App Store listing, though editorial PCOS content lives on its website.
Logging breadth: Clue tracks 200+ symptoms and experiences, from cramps and energy to sleep and skin, plus period, trying-to-conceive, pregnancy, and perimenopause modes. It integrates with Apple Watch, Oura, WHOOP, Withings, and Fitbit.
Privacy: an account is mandatory, and data sits on EU servers (AWS EU) under GDPR. Clue states the sensitive health data you track “is never shared with or sold to advertisers,” and shares de-identified data with research partners only with consent.
Genuine strength over Vera: Clue runs on Android, offers 200+ trackables and wearable integrations, life-stage modes, and an explicit never-sold policy with an EU/GDPR posture.
Should you consider AskPCOS from Monash?
AskPCOS, now AskPMOS on the web, comes from Monash University, the group leading the international PCOS/PMOS guideline effort. It’s free with no in-app purchases, on iOS and Android (as of July 4, 2026). In the 2025 JMIR review it earned the highest overall score of the 15 apps assessed (JMIR, 2025).
Best for: people who want evidence-based information and help talking with their care team.
Cycle handling: AskPCOS includes a symptoms tracker and a question-prompt list for appointments, alongside evidence-based information and a discussion forum. Most information is available without an account.
Logging breadth: it’s lighter on daily logging than the symptom-tracking apps, and heavier on education and clinician-conversation tools.
Privacy: its App Privacy label lists health data, contact info, user content, and identifiers linked to your account, with non-linked location and usage analytics.
One honest note on freshness: the iOS app was last updated in September 2023, aligned to the 2023 evidence-based guideline. The companion website is current and has been rebranded AskPMOS, reflecting the name change.
Genuine strength over Vera: it’s free, built by the guideline group, runs on Android, and offers appointment question prompts and a discussion forum.
Is Bearable useful for PMOS symptom patterns?
Bearable is a chronic-condition symptom tracker with the deepest correlation engine in this roundup. It has a free tier with unlimited custom tracking, weekly reports, and graphs; Premium is about $34.99 for a year of access, with a 7-day trial, per Bearable’s site (as of July 4, 2026). It runs on iPhone, Mac, and Android (Bearable).
Best for: people managing more than one condition who want to spot patterns across symptoms.
Cycle handling: Bearable names PCOS among the conditions it tracks, and its official materials center correlations and patterns rather than cycle predictions.
Logging breadth: this is its strong suit. You can log mood, symptoms, pain, migraines, gut symptoms, the menstrual cycle, medications, diet, hydration, energy, and sleep, plus custom measurements like blood pressure, glucose, temperature, and HRV. It imports from Apple Health and Fitbit.
Privacy: Bearable uses cloud backup, with data encrypted before backup, under UK GDPR. It states it “does not and will never sell any personal data,” and offers in-app export and deletion.
Genuine strength over Vera: the deepest customizable whole-body correlation engine, built for multi-condition management, on Android and Mac.
What about Euki for private tracking?
Euki is a free, privacy-focused tracker from a nonprofit, and it shares Vera’s on-device stance. It’s free with no in-app purchases, on iOS and Android, in English and Spanish (as of July 4, 2026). Its App Store privacy label reads “Data Not Collected,” with all data stored locally and no account required (Euki).
Best for: people who want a free, on-device tracker with strong sexual and reproductive-health education.
Cycle handling: Euki offers period tracking with cycle summaries, and its listing describes “Period Predictions” as its own feature. It also logs symptoms and sends medication and appointment reminders.
Logging breadth: it covers period and symptom logging plus education on contraception, abortion, STIs, and sexual health. It isn’t condition-specific, so it has no PMOS features.
Privacy: everything stays on your device, with no account, email, or phone number, plus a PIN and a fake-screen emergency code. It’s praised by Mozilla’s Privacy Not Included guide (Mozilla Foundation).
Genuine strength over Vera: Euki is entirely free, runs on Android, is nonprofit-governed, and offers inclusive sexual and reproductive-health education. The honest difference is scope: Vera adds PMOS-specific whole-body logging, including labs and encrypted photos, an Apple Health import, and a Doctor Report, while Euki keeps things general.
Where does PMOS Vera fit in?
Vera (that’s us) is an iOS-only tracking and pattern-recognition companion built specifically for PMOS. Daily logging is free forever, with no account and no card. Vera Premium, a paid subscription, is about $5.99 per month or $39.99 per year with a 14-day free trial (as of July 4, 2026).
Best for: iPhone users who want PMOS-specific, whole-body logging with everything kept on their own device.
Cycle handling: Vera treats long and variable cycles as normal for you. Day 47 is simply Day 47. It reflects your own logged history and never predicts or forecasts your cycle.
Logging breadth: you can log cycle days, symptoms, mood, food, medications, sleep, stress, lab values, notes, and photos. With permission, Vera reads sleep, steps, and period data from Apple Health to enrich your history; it never writes back.
Privacy: everything is stored only on your iPhone, in a database encrypted with SQLCipher (AES-256), with the key in the iOS Keychain and photos individually encrypted. There’s no account, no cloud sync, and no Vera server.
Premium adds Insights, the Doctor Report (a clean, doctor-ready PDF of cycles, symptoms, and labs), Quick Log, lab tracking, the photo journal, and Home insight cards.
Where a competitor is the better pick, plainly: if you’re on Android, Vera can’t help you, and Flo, Clue, AskPCOS, Bearable, or Euki are your options. If you want a community forum, AskPCOS wins. If you need pregnancy or perimenopause modes, Flo or Clue fit better.
How do these PMOS apps compare?
| App | Free tier | Platforms | PMOS focus | Where data lives |
|---|---|---|---|---|
| Flo | Yes (paid IAPs) | iOS, Android | PCOS content + Premium symptom checker | Cloud, account required |
| Clue | Yes (Clue Plus paid) | iOS, Android, Watch | Editorial PCOS content on site | EU servers (AWS EU), account required |
| AskPCOS / AskPMOS | Yes (fully free) | iOS, Android | Built by the guideline group | Cloud per privacy label; account optional |
| Bearable | Yes | iOS, Android, Mac | Names PCOS among conditions | Cloud backup, encrypted |
| Euki | Yes (fully free) | iOS, Android | Not condition-specific | On device, no account |
| PMOS Vera (ours) | Yes (free forever) | iOS only | PMOS-specific whole-body logging | On device, no account, no cloud |
Frequently asked questions
Which cycle app is best for PMOS?
There’s no single winner, because it depends on your phone, your budget, and your privacy comfort. AskPCOS is built by the guideline group, and Euki is the free on-device option. For iPhone users who want PMOS-specific, on-device logging, Vera is built for exactly that.
Are period tracking apps private with PMOS data?
It varies a lot. Some apps store your data in the cloud with an account, while others keep everything on your device. Euki’s App Store label reads “Data Not Collected,” and Vera stores everything locally with no account or cloud (Euki). Always read an app’s privacy label before you commit.
Is there a good free app to track PMOS?
Yes, several. AskPCOS and Euki are fully free with no in-app purchases (as of July 4, 2026), and Vera’s daily logging is free forever. Bearable offers a capable free tier, and Flo and Clue are free with paid upgrades. A 2025 JMIR review noted 12 of 15 assessed apps were commercially affiliated (JMIR, 2025).
Do I need an app that handles long cycles for PMOS?
It helps. With PMOS, cycles are often longer, and a study of over 600,000 cycles put the average at 29.3 days against a typical 21–35 day range (npj Digital Medicine, 2019). Look for an app that treats a long cycle as ordinary, not as something to worry about.
A note on medical advice
This roundup is general information to help you compare apps, not medical advice, and it can’t diagnose anyone or guide treatment. App features and prices change, so check each app’s current App Store listing before you decide. For anything about your own health or care, please speak with a qualified healthcare professional who knows your history.