Comparison

Flow vs Period Simple

Price, ratings, monetisation and update history for both apps, side by side โ€” with what reviewers say about each.

Head to head
About

Flow

Features
Read full description

FlowSync is your intelligent period and cycle tracking companion. With a beautiful, intuitive calendar interface, FlowSync helps you understand your body's natural rhythms. KEY FEATURES: โ€ข Smart Calendar โ€” Visual cycle tracking with color-coded days for period, fertile window, and ovulation โ€ข Period Predictions โ€” AI-powered cycle predictions based on your history โ€ข Symptom Tracking โ€” Log mood, energy, cramps, and other symptoms daily โ€ข Today View โ€” At-a-glance dashboard showing cycle day, phase, and upcoming events โ€ข Cycle Insights โ€” Understand your patterns with detailed cycle analysis โ€ข Beautiful Design โ€” Clean, modern interface that's a joy to use FlowSync is designed for informational and general wellness purposes only. It is not intended to be used for contraception, medical advice, diagnosis, or treatment. Always consult your healthcare provider for medical concerns.

About

Period Simple

Read full description

Period Simple is a calm, private way to record period start dates and prepare for your next cycle. Features: โ€ข Log a period start with one tap โ€ข Learn from recent cycle history โ€ข See an estimated date and prediction window โ€ข Receive optional local reminders โ€ข Keep all cycle data on your iPhone โ€ข Use the app in English or Simplified Chinese Cycle timing can vary. Predictions are estimates only and are not medical advice or a method of contraception.

Screenshots

Flow4 screens
Period Simple1 screens

Verdict

The call

Flow and Period Simple are too close to call on the numbers: across 5 compared parameters โ€” price, ads, in-app purchases and device support among them โ€” neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ScorecardNo meaningful differences
Flow versus Period Simple: the parameters behind the verdict, then further details
ParameterFlowPeriod Simple
PriceFreeFree
Update frequencyEvery 3 weeksโ€”
AdsNoNo
In-app purchasesNoNo
DevicesiPhoneiPhone
Requires iOS17.017.0
Further details โ€” not scored
Size4 MB2 MB
Age rating4+4+
Developerๆ‹ฅๅ†› ๅˆ˜Wei Nie

In-app purchases

None

Flow

No in-app purchases

None

Period Simple

No in-app purchases

Questions

Is Flow free?
Flow is free to download, with no in-app purchases.
Is Period Simple free?
Period Simple is free to download, with no in-app purchases.
Do Flow or Period Simple have ads?
Neither Flow nor Period Simple shows ads.

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