Comparison
Flo vs Period Calendar 2026: Ochrana súkromia, funkcie a porovnanie cien
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 a Period Calendar od Simple Design sú podľa počtu stiahnutí dva najpopulárnejšie sledovače menštruácie, aké boli kedy vytvorené. Flo tvrdí, že má 440 miliónov používateľov; Period Calendar tvrdí, že má 300 miliónov. Spoločne predstavujú takmer tri štvrtiny miliardy účtov sledujúcich údaje o reprodukčnom zdraví.
Aplikácie sa dramaticky líšia prístupom. Flo je komplexná zdravotná platforma s AI chatbotom, komunitnými fórami, odborným obsahom a prémiovými predplatnými. Period Calendar je jednoduchý, bez frázový sledovač — zaznamenajte si menštruáciu, sledujte predpovede, sledujte symptómy. Flo sa zameriava na angažovaného zdravotného spotrebiteľa; Period Calendar sa zameriava na používateľa, ktorý chce predovšetkým jednoduchosť.
Čo majú spoločné, je medzera v ochrane súkromia. Flo je zdokumentovaná na federálnom súde. Period Calendar je zakomponovaná do jeho obchodného modelu — tvrdí, že nezbiera údaje, zatiaľ čo prevádzkuje Google reklamné SDK, ktoré zbierajú údaje podľa 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 bohatá na funkcie: 70+ symptómov, AI chatbot, komunitné fóra, tehotenský režim, obsah od 120+ lekárskych odborníkov. Je to zdravotná platforma, nie len sledovač.
Period Calendar je jednoduchý na funkcie: zaznamenávanie menštruácie, odhady ovulácie, sledovanie symptómov a kalendárny pohľad. Platená verzia odstraňuje reklamy. Je to nástroj na zaznamenávanie, ktorý spoľahlivo robí základy.
Medzi oboma, Flo jasne ponúka viac. Ale funkcie Flo prichádzajú s cloudovým spracovaním, predplatnými a zdokumentovanými porušeniami ochrany súkromia. Jednoduchosť Period Calendar prichádza s reklamami a zastaranou architektúrou.
PinkyBloom ponúka funkcie na úrovni Flo — AI asistent, predpovede nálady, zdravotný trezor, správy od lekárov — s jednoduchosťou na úrovni Period Calendar — nie je potrebný účet, funguje okamžite. Hlasové zaznamenávanie znamená sledovanie bez rúk bez manuálnych menu.
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.
