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Period Diary: Flow & Ovulation

Period Diary: Flow & Ovulation

Private Ovulation Calendar Log

429 ratings
66 reviews
💪 Health & Fitness
🏥 Medical
Free
In-App Purchases

Details

Released
August 6, 2015
Updated
November 12, 2026

Features

Developer

Sasa Kolda
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Period Diary: Flow & Ovulation screenshot #1 for iPhone
Period Diary: Flow & Ovulation screenshot #2 for iPhone
Period Diary: Flow & Ovulation screenshot #3 for iPhone
Period Diary: Flow & Ovulation screenshot #4 for iPhone
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Period Diary: Flow & Ovulation screenshot #7 for iPhone
Period Diary: Flow & Ovulation screenshot #8 for iPhone
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🧾$5.99
In-App Purchase↘︎
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About

This app offers a simple and private way to track your menstrual cycle, ovulation, and fertility. It provides accurate predictions for future periods and fertile windows, learning from your logged data. Get notifications for important cycle events and understand your reproductive health without needing an account.

✓Private data, no account needed
✓Accurate period and ovulation predictions
✓Learns from logged cycle data
✓Tracks weight, flow, intimacy, temperature
✓Future predictions 3+ months in advance
✓Daily notes for symptoms and birth control
Show original description

What users say about Period Diary

Reviews of Period Diary are mixed: the Health & Fitness app is rated 4.1/5 from 429 App Store ratings. What users like most: no account required, data stays on device, simple and minimalist design. Top complaints: frequent app crashes and instability, calendar functionality broken or inaccessible. Summarized from real user reviews.

Positive things

  • 🔒No account required, data stays on device
  • 👍Simple and minimalist design
  • 💰Free basic period tracking without paywall
  • 📱Intuitive for basic tracking needs
  • 🎨Aesthetic and visually appealing interface
  • ⚡Quick access to period predictions
  • 👥Suitable for younger users under 13

Negative things

  • 🐛Frequent app crashes and instability
  • 🐛Calendar functionality broken or inaccessible
  • ❌Cannot edit period end dates properly
  • ❌Cannot log past period dates
  • 🌍No timezone support causing date confusion
  • 👁️Poor accessibility and low contrast text
  • 📚Unclear color coding without explanation
  • 🎯Confusing UI and non-intuitive navigation
  • 💳Premium purchase issues and failed billing
  • 📺Excessive or inappropriate ads
  • 🔧Settings not saving properly
  • 📊Inaccurate cycle predictions for irregular periods
  • 🌐No localization for different countries/languages
  • 🔤Inconsistent and tiny text sizing
See all reviews
+1

What's New in Period Diary

4.0.0

November 12, 2026

A Gentle New Look & Home Screen Calendar Widget! • Fresh Rose & Lavender Design: A calm, clear, and cute visual redesign across the Cycle Wheel, Calendar, and Period Log. • NEW Home Screen Calendar Widget (Premium): See your current cycle day, status, and monthly period & fertile calendar right on your Home Screen. • Enhanced Prediction Accuracy: Unified timezone-safe day calculations and improved outlier filtering so your Cycle Wheel, Calendar, and countdowns are always in sync.

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1

Subscriptions & In-App Purchases

$5.99

Period. Premium Lifetime

Enables all Premium features forever

User reviews

Most RecentHighest RatedLowest Rated

I liked the old version better

If I would have reviewed this app before, I would have given it 5 stars but it has since updated and I don’t like it and now having to look for a new period tracker.
D1Devo 1517

App Issues

I have really liked this app; however it has stopped working. Please post an update. I will change my review.
LLittlewasper

Simplicity Request

Could you please offer the ability to only track periods on the calendar without seeing the purple fertility days? That would be great.
ZZappityZapZap

Slight problem

The problem is that we’re it says temperature, I think it’s in Fahrenheit. And I’m Aussie so just sorta left it at the same temperature as it started. Also another thing I feel like this app is more suited for older than 35 year old woman. I will say I’m gen z and quite a bit younger than 35. I guess what I’m trying to say is maybe there could be different countries/age language changes. And if you’ve gotten as far as reading all this THANK U
<3 much love from Australia 🇦🇺😀
Show more
774piggy

Very basic

Every time I try and open the calendar on this app it closes the app it is just too basic for me
GGodfamilyniners
See 61 more reviews

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User experience

🐞

Reported Bugs

15 issues

App crashes when opening calendar

Bug

App crashes when trying to edit start dates

Bug

Cannot set period end date in same month as start date

Bug

Cannot log dates from previous months

Bug

App freezes during countdown timer

Bug

Premium purchase not registering after payment

Bug

Restore purchase function not working

Bug

Settings not persisting after changes

Bug

Notifications settings not saving

Bug

App crashes during initial setup

Bug

Calendar glitches with date selection

Bug

Auto-sets end date to current date instead of allowing edits

Bug

Dark interface with poor text readability

Bug

Notifications button crashes app when clicked

Bug

Inconsistent app performance and stability

Bug
✨

Requested Features

11 requests

Option to hide fertility tracking, show only period days

Feature

Timezone selection capability

Feature

Notes or symptom logging on calendar

Feature

Clearer explanation of color coding system

Feature

Support for irregular cycle adjustments

Feature

Customizable tracking options for different body types

Feature

Dark mode or adjustable contrast settings

Feature

Localization for different countries and age groups

Feature

Temperature tracking in Celsius and Fahrenheit

Feature

Ability to edit past period entries

Feature

More detailed symptom tracking options

Feature

FAQ

What does this period tracking app do?

This app serves as a simple and private ovulation, fertility, and period tracker. It helps you monitor your menstrual cycle, predict future periods and fertile windows, and understand your reproductive health. It learns from your logged data to provide increasingly accurate predictions.

How does the app predict my period and ovulation?

The app uses a powerful and accurate prediction algorithm that learns from each time you log your menstrual cycle and symptoms. This smart algorithm helps provide the most accurate data and predictions for your unique cycle, including fertile phases and expected period start dates.

Is this app free to use?

The app is free to download and use, offering core tracking functionalities. It also includes in-app purchases, which may unlock additional features or advanced functionalities for users who wish to enhance their tracking experience.

What information can I track with this app?

You can track a variety of data points related to your menstrual cycle and reproductive health. This includes your period flow, intimacy, temperature, and daily symptoms. You can also take notes on birth control pills and other relevant information.

Who is this app designed for?

This app is designed for anyone who wants a simple, discreet, and private way to track their menstrual cycle, ovulation, and fertility. It's particularly useful for individuals who prefer not to share their data online or require accurate predictions for family planning or general health monitoring.