Comparison
Flo vs Period Calendar 2026: Comparación de Privacidad, Características y Precio
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 y Period Calendar de Simple Design son, por número de descargas, los dos rastreadores de períodos más populares jamás creados. Flo afirma tener 440 millones de usuarios; Period Calendar afirma tener 300 millones. Juntos representan casi tres cuartas partes de mil millones de cuentas que rastrean datos de salud reproductiva.
Las aplicaciones son dramáticamente diferentes en su enfoque. Flo es una plataforma de salud integral con chatbot de IA, foros comunitarios, contenido de expertos y suscripciones premium. Period Calendar es un rastreador sencillo, sin complicaciones: registra tu período, ve predicciones, rastrea síntomas. Flo se dirige al consumidor de salud comprometido; Period Calendar se dirige al usuario que busca simplicidad por encima de todo.
Lo que comparten es una brecha de privacidad. La de Flo está documentada en un tribunal federal. La de Period Calendar está incrustada en su modelo de negocio: afirma no recopilar datos mientras ejecuta SDKs publicitarios de Google que recopilan datos por diseño.
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 está llena de características: más de 70 síntomas, chatbot de IA, foros comunitarios, modo de embarazo, contenido de más de 120 expertos médicos. Es una plataforma de salud, no solo un rastreador.
Period Calendar es simple en características: registro de períodos, estimaciones de ovulación, seguimiento de síntomas y vista de calendario. La versión de pago elimina los anuncios. Es una herramienta de registro que hace lo básico de manera confiable.
Entre las dos, Flo claramente ofrece más. Pero las características de Flo vienen con procesamiento en la nube, suscripciones y violaciones de privacidad documentadas. La simplicidad de Period Calendar viene con anuncios y arquitectura heredada.
PinkyBloom ofrece capacidades al nivel de Flo: asistente de IA, pronósticos de estado de ánimo, bóveda de salud, informes médicos, con la simplicidad al nivel de Period Calendar: no se necesita cuenta, funciona de inmediato. El registro por voz significa seguimiento manos libres sin menús manuales.
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.
