Period tracker · iOS

Know your cycle.
Keep it yours.

Log cycles and symptoms and get predictions, without your most private health data ever leaving your phone.

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Flow State today screen: 17 days until next period
01 Features

Scroll through it.

Flow State today screen: 17 days until next period
01
Today

One screen answers the only question.

Open the app and you land on today's cycle: how many days until the next period, with the days around it laid out in an arc. No tour, no sign-in wall, no ad.

  • Opens straight to today
  • Predictions and countdown
  • No account, ever
02
Calendar

Predictions and the fertile window, free.

Period, fertile, follicular, luteal and predicted days are colour coded on a month calendar, with your history alongside. The forecast is part of the app, not part of a paid tier.

  • Period, fertile, predicted days
  • Full history
  • Nothing locked behind a plan
03
Logging

One tap to log. Saved to your phone.

Tap Period Started and it is logged, with symptoms and moods saved the same way. Everything goes into a database on your phone. Nothing syncs and nothing is shared, because there is no server to send it to.

  • On-device database
  • No sync, no sharing
  • Delete the app, delete the data
02 Screens

Light and dark, every screen.

Flow State today screen: 17 days until next period
Today · Light
Flow State today screen: 17 days until next period (dark theme)
Today · Dark
Flow State calendar showing period and fertile days
Calendar · Light
Flow State calendar showing period and fertile days (dark theme)
Calendar · Dark
03 Privacy

Flip the label.

Your cycle history lives in an on-device database. Nothing syncs, nothing is shared.

Data Linked to You The following data may be collected and linked to your identity:
  • Health & Fitness Cycle dates, symptoms and moods. Apps like this usually upload them to their own servers, where they can be analyzed, shared or sold.
  • Location Apps like this usually log your IP address or GPS position, so they know where you live, work and travel.
  • Contact Info Your name, email or phone number, usually collected at sign-up and tied to everything else the app knows about you.
  • Identifiers Device and advertising IDs that let companies recognize you across different apps and websites.
  • Usage Data Every tap and screen view is usually logged, to profile how you use the app and what to sell you next.
  • Purchases What you bought, or almost bought, which usually feeds ad targeting and personalized pricing.
  • Diagnostics Crash and performance logs that usually carry device details and can double as another tracking signal.
Price
$9.99/mo after trial
Account
Required
04 Compared

Flow State vs Flo.

The short version. The full side-by-side has a source for every claim about the other app.

Price
Free, forever
Account
Never asked for
Where data lives
On your iPhone only
App Store privacy label
Data Not Collected
● Live

Your cycle is your business.

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