Comparison
PCOS Polly vs Flo: Which App Is Better for PCOS? (2026)
PCOS Polly vs Flo for PCOS: irregular cycles, symptom and food tracking, AI help, fertility, privacy, and free options compared, with who each app suits.
By PCOS Polly ·
Key takeaways
- Choose PCOS Polly if PCOS is the main thing you are managing: it puts meals (with a PCOS score), symptoms, cycle, supplements, sleep, and workouts in one timeline, with Chat with Polly to explain patterns.
- Choose Flo if you mainly want a period and fertility calendar, pregnancy mode, partner sharing, Apple Watch or Android support, or perimenopause tools.
- Flo's free plan covers period logging; its PCOS (now PMOS) Symptom Checker, Health Assistant, and doctor's report are Premium features and the Symptom Checker is not offered in the UK or EU.
- Flo predicts periods and ovulation from your logs, which is less reliable when PCOS cycles run long; PCOS Polly logs bleeds and symptoms by date without forcing a 28-day forecast.
- Both are free to download. PCOS Polly gives every new account a 7-day free trial of the full app.
PCOS Polly is built for managing PCOS day to day; Flo is built for tracking a menstrual cycle across life stages. If you want to see how meals, sleep, supplements, and workouts affect your PCOS symptoms, PCOS Polly fits better: snap a meal photo to get a PCOS score, log symptoms and bleeds by date, and ask Polly what changed. If you mainly want a period and ovulation calendar, pregnancy tracking, partner sharing, or Android support, Flo is the stronger choice.
Disclosure: this site is made by the PCOS Polly team. Facts about Flo come from its US App Store listing, help center, and product pages, checked October 26, 2026. Features change, so check the current listing before subscribing.
PCOS Polly vs Flo at a glance
| PCOS Polly | Flo | |
|---|---|---|
| Built for | People managing PCOS (now also called PMOS) | Periods, fertility, pregnancy, and perimenopause |
| Platforms | iPhone and iPad (Android waitlist) | iPhone, Apple Watch, Android |
| App Store rating (US, Oct 2026) | 4.8 (552 ratings) | 4.7 (about 2 million ratings) |
| Irregular cycles | Logs bleeds and symptoms by date; no forced 28-day predictions | Supports irregular cycles; predicts periods and fertile window from your logs |
| Symptom tracking | PCOS symptoms (acne, hair, cravings, energy, mood, bloating) with trends | 70+ symptoms and moods |
| Food tracking | Photo, barcode, and nutrition-label scanning with a PCOS score per meal; protein, fiber, added sugar | Not a focus |
| Recipes and meal plans | Hundreds of PCOS-friendly recipes; Polly builds recipes from what you have | Articles only |
| Supplements, water, sleep, weight | Yes, with reminders | Sleep and well-being in Premium (Flori) |
| Workouts | Guided cycle-synced workouts; Apple Health | Activity in Premium well-being features |
| AI help | Chat with Polly: questions, log meals by text, generate recipes | Health Assistant chatbot (Premium) |
| PCOS screening | Free Do I have PCOS? self-check on our site | Premium Symptom Checker for PMOS, endometriosis, fibroids (not in UK/EU) |
| Fertility and pregnancy | Cycle and symptom logs only | LH test and BBT logging, fertile window, pregnancy mode, partner app |
| Doctor report | Share trends from the app | 6-month doctor’s report in Premium (iOS) |
| Trying it free | 7-day free trial of the full app (how it works) | Free plan for period logging; Premium upgrade |
Why a general period app struggles with PCOS
Flo is excellent at what it was made for. The problem is the job. Cycle apps estimate your next period and fertile window from your past cycles, and with PCOS the gaps can swing from 30 to 90+ days. That leads to “late” notices and fertile windows that never match your body. We cover the mechanics in why period apps get PCOS wrong.
The bigger gap is what PCOS actually responds to. The 2023 international PCOS guideline puts lifestyle (food, activity, sleep, and weight where relevant) at the center of management, alongside medication. A cycle calendar does not show you that your 3 pm crashes follow low-protein breakfasts, or that your skin settles in weeks you sleep 7+ hours.
Where PCOS Polly is stronger
- Food next to symptoms. Every meal gets a PCOS score based on protein, fiber, and blood-sugar impact, and lands in the same timeline as cravings, energy, acne, and your cycle. That is how you find your own triggers instead of following a generic list.
- Chat with Polly. Ask “why am I so tired this week?”, log a meal by describing it, or ask for a 30 g protein breakfast with what is in your fridge. Reviewers mention using it to prepare for doctor visits.
- Habits that move PCOS. Supplements (like inositol), water, steps, sleep, and weight sit in one place, with reminders.
- Recipes and workouts. Hundreds of PCOS-friendly recipes and short guided workouts, so the app helps you act on what you see. Browse our free PCOS recipes and workout plan to get a feel for the approach.
Where Flo is stronger
- Fertility and pregnancy. If you are trying to conceive, Flo’s LH test and basal body temperature logging, fertile-window view, and pregnancy mode are more complete. Our guide on how to track ovulation with PCOS explains how to read those signals when cycles are irregular.
- Platforms and partners. Flo runs on Android and Apple Watch and has a partner app. PCOS Polly is iPhone and iPad only for now.
- Life stages. Flo covers teens to perimenopause, with a Perimenopause Score and timeline.
- A large free tier. Basic period logging and the calendar are free.
Privacy: what to know
In 2021 Flo settled with the US Federal Trade Commission over sharing users’ health data with analytics and marketing firms, including Facebook and Google, despite promising privacy. In 2025 it settled a class action over the same 2016-2019 data sharing. Flo now offers an Anonymous Mode and says it holds two international data-protection certifications. Whatever app you use, check its App Store privacy label and settings, and only log what you are comfortable storing.
What real users say
- On Flo: long-time users praise the calendar and reminders, while recent reviews often complain that insights sit behind Premium prompts. Some people credit Flo’s nudges with prompting them to ask a doctor about PCOS.
- On PCOS Polly: reviewers most often mention the meal score and Chat with Polly, for example using it to spot glucose-friendly swaps or to organize symptoms before an appointment.
Which should you choose?
- You were just diagnosed and want to learn what helps your symptoms: PCOS Polly.
- You want meal scores, cravings, and energy next to your cycle: PCOS Polly.
- You are actively trying to conceive and logging LH and BBT: Flo (or a dedicated fertility tracker), plus PCOS Polly for food and symptoms if you like.
- You use Android: Flo for now, and join the PCOS Polly Android waitlist.
- You only want a free period calendar: Flo’s free plan or another cycle app. See our pick of the best period trackers for irregular cycles.
For the wider field, see best PCOS apps in 2026 and PCOS Polly vs PCOS Pal.
Try both for a week
Keep Flo for your calendar and use PCOS Polly free for 7 days with the plan in our symptom tracker guide: log every meal and three symptoms daily, then open your trends on day 7. If it does not show you anything new, cancel in iPhone Settings → your name → Subscriptions before the trial ends.
Try PCOS Polly free for 7 days →
Sources
- PCOS Polly on the App Store (listing and ratings, October 2026)
- Flo on the App Store (listing and ratings, October 2026)
- Flo Health. What is included in Flo Premium? and Symptom Checker.
- US Federal Trade Commission. FTC finalizes order with Flo Health, June 2021.
- Reuters. Google, Flo Health to pay $56 million in period-tracking app privacy case, September 2025.
- Teede HJ et al. 2023 International Evidence-based Guideline for the Assessment and Management of PCOS.
Frequently asked questions
Is PCOS Polly or Flo better for PCOS? +
For day-to-day PCOS management, PCOS Polly is the closer fit because it tracks the levers that move PCOS symptoms, such as protein and fiber at meals, sleep, supplements, and workouts, next to your cycle and symptoms. Flo is stronger as a general period, fertility, and pregnancy app. Many people use Flo for the calendar and a PCOS-specific app for everything else.
Does Flo have a PCOS mode? +
Flo does not have a separate PCOS app. It supports irregular periods in the free version and offers a Premium Symptom Checker that compares your symptoms with common signs of PMOS (formerly PCOS), endometriosis, and fibroids and gives you a report to discuss with a doctor. It is informational, not a diagnosis, and is not available in the UK or EU.
Can I use PCOS Polly and Flo together? +
Yes. A common setup is Flo or another cycle app for the period calendar and ovulation-test logging, and PCOS Polly for meals, symptoms, supplements, and habits. Log period start dates in PCOS Polly too, so your symptom patterns line up with your cycle.
Is Flo safe to use with PCOS data? +
Flo settled with the US Federal Trade Commission in 2021 over sharing users' health data with analytics and marketing companies, and settled a related class action in 2025. It now offers an Anonymous Mode and says it holds two international data-protection certifications. Review any app's privacy settings and what you are comfortable logging.
Does PCOS Polly work on Android like Flo? +
Not yet. PCOS Polly runs on iPhone and iPad today, with an Android waitlist at pcospolly.com/android. Flo is on iPhone, Apple Watch, and Android.
Keep reading
All articles →-
ComparisonPCOS Polly vs PCOS Pal: Which PCOS App Fits You? (2026)
PCOS Polly vs PCOS Pal compared on tracking, food logging, meal plans, lessons, workouts, and trials. Who each app suits best.
Read article -
ComparisonBest PCOS Tracker Apps in 2026: PCOS Polly, Flo, Clue and Ovura Compared
A sourced comparison of four apps for PCOS symptoms, irregular cycles, food logging, fertility features and pricing, with direct guidance on which to choose.
Read article -
ComparisonWhy Period Apps Like Flo Get PCOS Wrong (and What to Use Instead)
Most period apps predict ovulation from a 28-day model, so with PCOS they keep calling you late and guessing fertile windows that never match. Here is why, how a PCOS-first app differs, and how to combine tools.
Read article
