Comparison
Flo vs Period Calendar 2026: Privatnost, Karakteristike i Cena Upoređeni
Our verdict
Flo (440M+ users) was accused of sharing data with Google and Meta. Period Calendar (300M+ claimed users) claims no data collection while running Google Ads. The two most-downloaded period trackers both have privacy contradictions. PinkyBloom resolves the contradiction entirely — zero ads, never sold.
Flo vs Period Calendar vs PinkyBloom
| Feature | Flo | Period Calendar | PinkyBloom |
|---|---|---|---|
| Price | ~$49.99/yr premium | Free with ads + IAP | Free |
| Users | 440M+ | 300M+ claimed | Growing |
| Data storage | Cloud (Flo servers) | Claims local storage | Stored on your phone |
| Privacy track record | Class action settled 2025; Flo paid $8M | Ad SDK contradictions documented | Never sold, no ads; partner sharing end-to-end encrypted |
| AI assistant | Cloud-based chatbot | Built-in AI assistant (Pinky) | |
| Voice logging | |||
| Mood forecasts | |||
| Content library | Thousands of articles | Basic tips | AI-generated insights |
| Account required | Email required | Optional | No account needed |
| Ads | Ads in free tier | Yes (Google Ads/AdMob) | No ads ever |
| Doctor visit reports | |||
| Languages | Many | Many | 71 languages |
Overview
Flo i Period Calendar od Simple Design su, prema broju preuzimanja, dva najpopularnija praćenja menstruacije ikada stvorena. Flo tvrdi da ima 440 miliona korisnika; Period Calendar tvrdi da ima 300 miliona. Zajedno predstavljaju skoro tri četvrtine milijarde naloga koji prate podatke o reproduktivnom zdravlju.
Aplikacije se dramatično razlikuju u pristupu. Flo je sveobuhvatna zdravstvena platforma sa AI chatbot-om, forumima zajednice, stručnim sadržajem i premium pretplatama. Period Calendar je jednostavno, bez suvišnih funkcija praćenje — zabeležite svoju menstruaciju, vidite predikcije, pratite simptome. Flo cilja angažovane korisnike u zdravstvu; Period Calendar cilja korisnike koji žele jednostavnost iznad svega.
Ono što dele je razlika u privatnosti. Flo-ova je dokumentovana na saveznom sudu. Period Calendar-ova je ugrađena u njen poslovni model — tvrdeći da ne prikuplja podatke dok koristi Google oglase SDK-ove koji prikupljaju podatke po dizajnu.
Privacy comparison
Flo's privacy failures are the most documented in the industry. An FTC order in 2021, a class action Flo settled for $8M in 2025, and a California jury verdict against Meta for eavesdropping on Flo users' data. Flo denies wrongdoing, and no court has found that it broke the law.
Period Calendar's privacy situation is different but concerning. The app markets itself with bold "we don't collect or store your data" claims. But it's ad-supported through Google Ads, DoubleClick, and AdMob. Privacy International documented heavy third-party network traffic to Google advertising services despite the local storage claims. Advertising SDKs collect device identifiers, usage patterns, and behavioral data by definition — that's how ad targeting works.
The pattern is the same: both apps say one thing about privacy and do another. Flo's contradiction ran for nearly three years before the press caught it. Period Calendar's contradiction is structural — you cannot simultaneously claim "no data collection" and run ad networks that require data collection to function.
PinkyBloom eliminates the contradiction. No ads means no ad SDKs. No accounts means no identity linkage. Your cycle log is stored on your phone, protected by your phone's own encrypted storage.
Features and intelligence
Flo je bogat funkcijama: 70+ simptoma, AI chatbot, forumi zajednice, režim trudnoće, sadržaj od 120+ medicinskih stručnjaka. To je zdravstvena platforma, a ne samo praćenje.
Period Calendar je jednostavan po funkcijama: beleženje menstruacije, procene ovulacije, praćenje simptoma i prikaz kalendara. Plaćena verzija uklanja oglase. To je alat za beleženje koji pouzdano obavlja osnove.
Između njih, Flo očigledno nudi više. Ali Flo-ove funkcije dolaze sa obradom u oblaku, pretplatama i dokumentovanim kršenjima privatnosti. Period Calendar-ova jednostavnost dolazi sa oglasima i zastarjelom arhitekturom.
PinkyBloom nudi mogućnosti na nivou Flo-a — AI asistent, prognoze raspoloženja, zdravstveni trezor, izveštaji lekara — sa jednostavnošću na nivou Period Calendar-a — nije potreban nalog, radi odmah. Beleženje glasa znači praćenje bez ruku bez ručnih menija.
Pricing comparison
Flo charges ~$49.99/year for premium. Period Calendar is free with ads and optional paid upgrades. The cost difference is significant — Flo is among the most expensive period trackers; Period Calendar is among the cheapest.
But the real cost includes what you pay beyond money. Flo costs subscriptions and, for nearly three years, your data. Period Calendar costs your attention (ads) and potentially your data (ad SDKs).
No ads, no hidden data costs. More features than Flo, simpler than Period Calendar, and never sold.
There's a better option
The two most-downloaded period trackers both have privacy contradictions — Flo's documented by the FTC, Period Calendar's embedded in its ad model. PinkyBloom is the zero-contradiction alternative: no ads, no account, never sold. More features than Flo, simpler setup than Period Calendar.
