People look for Flo alternatives when Premium banners follow every tap, when a feature that used to be free now sits behind a paywall, or when they want a different privacy story. This is a source-reviewed guide, not a hands-on lab test. Store listings and named public records were captured on 13 September 2026.
Who these Flo alternatives are for
This page is for people who already know Flo and want a different daily log. It is not a generic “best apps” list. That job sits at best period tracker apps.
Stay with Flo if Secret Chats, partner tools and Anonymous Mode still earn the banner fatigue. Leave, or add a second app, if you want EU hosting, a moon-framed diary, or a no-account calendar with ads.
The shortlist is Clue, Stardust and Period Calendar Period Tracker — the three siblings already on this desk. We compared public store pages, manufacturer help, privacy labels and named papers. We did not log cycles in a lab.
How we compared Flo alternatives
Each row uses one job, one platform set, and dated public prices. Apple and Google ratings stay in separate cells. UK and US prices stay apart. If a storefront showed several in-app SKUs, we list the range and say to check the live checkout.
We omit install counts that were not on the page we opened. Manufacturer “millions of users” lines stay labelled as marketing.
Flo alternatives comparison
| Candidate | UK price | US price | Platforms | Store rating (source + date) | Adoption signal | Subscription | Privacy caveat | Sentiment snapshot | Evidence | Best for | Why it is an alternative | Limitation |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clue | £7.99 / month; £23.99 or £24.99 / year (UK Apple IAP) | $9.99 / month; $39.99 / year. Yearly $39.99 vs $119.88 monthly | iPhone (iOS 18+), Android, named wearables | US Apple 4.8 / 403,000; UK Apple 4.7 / 110,000; US Play 4.5 / about 1.47–1.49 million (13 Sep 2026) | Play copy says “over 100M people.” Marketing, not an install band | Free calendar; Clue Plus for 12-month forecasts, BBT charts, Connect | Policy 14 Jul 2026: EU servers. Play: may share personal and health types. Apple: identifier tracking | 2025 Play notes: Plus pop-ups after each action | Default fertile window not clinically tested (Clue support 3 Mar 2026). Jennings 2019 = Dot. Li 2020 = historic Clue logs | People who want Berlin hosting and wearable import | Replaces Flo’s US-heavy privacy story with EU server copy and a simpler Plus grid | Plus prompts. Period-mode window is not a contraceptive |
| Stardust | £6.99 / month; yearly rows £24.99–£39.99. Unlabelled All Access tiles also listed | $6.99 / month ($83.88 / year if billed 12 times); yearly rows from $24.99 | iPhone (iOS 15.2+), Android; Watch / Oura on store copy | US Apple 4.8 / 117,000; UK Apple 4.8 / 13,000; US Play 4.6 / about 22,500–22,700 | No verified install band on the pages we opened | Free tier with predictions per FAQ; Super / All Access optional; some annual trials | Play: no sharing declared. Apple: tracking via purchases, identifiers, usage. Policy 8 May 2026 names ad partners | Play notes: lag and a 2026 data-sale rumour the developer denied | No PubMed accuracy paper for the 2026 build found. Hormone graphs are not assays | People who want lunar framing beside a symptom log | Replaces Flo’s clinical-adjacent tone with moon, cards and partner share | Astrology copy is not evidence. Label mismatch on sharing |
| Period Calendar | £8.99 / month; yearly £34.99–£39.99; weekly £1.49; ad removal £2.99 | $9.99 / month; yearly $39.99 or $49.99; weekly $1.49; ad removal $2.99 | iPhone (iOS 15+), Apple Watch, Android, Wear OS | US Apple 4.9 / 173,000; UK Apple 4.9 / 21,000; US Play 4.9 / about 4.77–4.89 million | Store copy claims 300 million users. Marketing. Play install band not shown | Free with ads; Premium optional. Weekly SKUs can cost more than a year if they renew | Play: no sharing declared; collects personal and health types. Apple: tracking. Policy URL returned 403 | Sep 2026 Play notes praised free tracking and partner mode | No independent accuracy paper found. Conception-chance copy is marketing | People who want a no-account calendar and will accept ads | Replaces Flo’s Premium funnel with a dense free diary | Ads. Aggressive fertility marketing. Seller names differ by store |
Clue if you want EU-hosted health data
Clue is the closest science-led Flo alternative on this shortlist. BioWink is based in Berlin. The 14 July 2026 privacy policy says health data sits on EU servers. Apple marked Conceive mode as a medical-device feature that shows fertile days as an aid for conception. The same listing says do not use Clue as contraception.
US Apple on 13 September 2026 was 4.8 from 403,000 ratings, version 293.0 (2 September 2026). Named Plus prices were $9.99 a month or $39.99 a year. UK Apple was 4.7 from 110,000 ratings, with £7.99 / £23.99–£24.99 rows. US Play was 4.5 from about 1.5 million reviews, updated 4 September 2026.
Clue support (3 March 2026) says the default fertile window in Period Tracking mode was never tested in a clinical study. Jennings et al. (2019) measured the separate Dot app in 718 women over 6,616 cycles. That paper is not a 2026 Flo-killer. Li et al. (2020) used historic Clue logs to describe variation. They did not score today’s Plus forecasts.
Pick Clue if EU hosting and wearable import matter, and you will pay or ignore Plus banners. Skip it if you wanted chats like Flo’s Secret Chats.
Stardust if you want moon-and-cycle framing
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Download Stardust Period Tracker on the App Store · Get Stardust Period Tracker on Google Play
Stardust is the lifestyle Flo alternative. Store copy mixes period predictions with a moon calendar, daily cards and pregnancy AR. The FAQ says the free tier is meant to stand alone. Super adds Cyclepedia and extra share tools.
US Apple: 4.8 from 117,000 ratings, version 3.9.3 (24 August 2026), monthly $6.99, yearly rows from $24.99. UK Apple: 4.8 from 13,000 ratings, £6.99 a month. US Play: 4.6 from about 22,600 reviews, updated 9 September 2026. Play Data Safety said no third-party sharing. Apple’s label still listed tracking. The 8 May 2026 policy names advertising partners. Read all three before you grant HealthKit.
We found no accuracy paper for 2026 Stardust forecasts. Hormone drawings are not blood tests. Both storefronts say it is not birth control.
Pick Stardust if Flo’s tone felt too clinical and you still want a dated log. Skip it if moon language will make you delete the diary.
Period Calendar if you want a free on-device diary
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Period Calendar Period Tracker is the long-running, ad-supported Flo alternative. Play says you can skip an account. The same page still lists collection of personal and health types. Apple listed tracking via identifiers and usage. The printed privacy URL returned 403 on our 13 September 2026 fetch.
US Apple: 4.9 from 173,000 ratings, version 3.9.1 about 8 September 2026. UK Apple: 4.9 from 21,000. US Play: 4.9 from about 4.8 million reviews, updated 10 September 2026, “Contains ads.” Yearly Apple rows sat at $39.99–$49.99 and £34.99–£39.99. Weekly Premium at $1.49 / £1.49 is a trap if you forget it is weekly.
Store copy claims 300 million users and talks about conception chance. The same listings say the app should not replace a contraceptive. Treat the user figure as marketing and the fertility line as a disclaimer, not a method. No PubMed accuracy paper for this build was found.
Pick Period Calendar if you want a dense free calendar and you will ignore ads. Skip it if Flo’s paywall annoyed you but a banner ad will annoy you more.
What you keep if you skip Flo alternatives
Many people do not need Flo alternatives. The free Flo download still logs periods and ovulation guesses on the pages we opened. Play (updated 9 September 2026) listed Anonymous Mode, Secret Chats, 70-plus symptoms, BBT, pregnancy week-by-week, and a Perimenopause Score. Premium adds daily insights, courses, a Symptom Checker (not in the UK or EU), and partner tools on that copy.
US Apple: 4.7 from 2 million ratings, age 13+, iOS 16+. UK Apple: 4.7 from 295,000. US Play: 4.7 from about 5 million reviews. Flo cites dual ISO 27001 and 27701 certificates and a 2025 PICCASO award on the listing. It also has a 2021 FTC consent order about earlier analytics sharing. Both facts can sit on the same page.
If your complaint is price, do the 12-month maths on the tile you are actually offered. If your complaint is paywall tone, Clue and Period Calendar still upsell — just in different voices.
Privacy when you switch Flo alternatives
Leaving Flo does not delete the old file. Use the in-app export if you want history. Then delete the account in the vendor flow, not only the home-screen icon.
New Flo alternatives still want health data. Clue Play listed third-party sharing of some types. Stardust’s Apple label listed tracking. Period Calendar’s policy page did not load for us. Flo’s Apple label listed tracking plus a long linked-data list. There is no clean “zero data” trophy on this shortlist.
Cycle pain during training is a clinic question, not an app setting. See exercise warning signs if movement itself is the worry.
Frequently asked questions
What is the cheapest of these Flo alternatives?
Is there a Flo alternative with no subscription at all?
Which alternative is best for privacy?
Will my predictions match if I switch apps?
Should I export Flo before I try an alternative?
Sources
- 1. Flo Cycle & Period Tracker
- 2. Clue Period & Cycle Tracker
- 3. Stardust Period Tracker
- 4. Period Calendar Period Tracker
- 5. FTC Finalizes Order with Flo Health…
- 6. What’s the fertile window?
- 7. Perfect- and typical-use effectiveness of the Dot fertility app over 13 cycles
- 8. Irregular periods
Guidance changes. Figures were checked against the sources above at the time of review; always confirm current advice with your GP, pharmacist or clinician.
Image credits
- Photo: Apple / App Store (App Store listing)
- Photo: Photo by Pexels contributor on Pexels / Openverse
- Photo: Photo by Pixabay on Pexels / Openverse
- Photo: Photo by fauxels on Pexels / Openverse
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