Flo与Period Calendar 2026：隐私、功能与价格比较

Flo和Simple Design的Period Calendar是下载量最多的两个月经追踪器。Flo声称有4.4亿用户；Period Calendar声称有3亿用户。它们共同代表了近七分之三亿的账户，用于跟踪生殖健康数据。

这两个应用在方法上截然不同。Flo是一个综合健康平台，拥有AI聊天机器人、社区论坛、专家内容和高级订阅。Period Calendar是一个简单、无花哨的追踪器——记录你的月经，查看预测，跟踪症状。Flo的目标是活跃的健康消费者；Period Calendar的目标是追求简单的用户。

它们共同存在一个隐私差距。Flo的隐私问题在联邦法院有记录。Period Calendar的隐私问题则嵌入其商业模式——声称不收集数据，同时运行设计上会收集数据的Google广告SDK。

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.

Flo功能丰富：70多个症状，AI聊天机器人，社区论坛，怀孕模式，来自120多位医疗专家的内容。它是一个健康平台，而不仅仅是一个追踪器。

Period Calendar功能简单：月经记录、排卵估算、症状跟踪和日历视图。付费版本去除广告。它是一个可靠的基本记录工具。

在两者之间，Flo显然提供了更多。但Flo的功能伴随着云处理、订阅和记录在案的隐私违规。Period Calendar的简单性伴随着广告和遗留架构。

PinkyBloom提供与Flo相当的能力——AI助手、情绪预测、健康库、医生报告——同时具备Period Calendar级别的简单性——无需账户，立即使用。语音记录意味着无需手动菜单的免提跟踪。

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.