# Period Diary: Privacy First — No account. No cloud. Privacy.

> Simple, private menstrual cycle, ovulation, and fertility tracker with predictive insights. (iPhone/iPad app by Sasa Kolda.)

- Source: https://appshunter.io/ios/app/period-diary-privacy-first/id1021545958 (this page in markdown: same URL + `.md`)
- Developer: [Sasa Kolda](https://appshunter.io/developer/1673557983)
- Category: Health & Fitness, Medical
- Price: Free with in-app purchases
- Rating: 4.10/5 from 427 App Store ratings · 65 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.1 · 45 MB
- Languages: American English
- Released: 2015-08-06
- Data updated: 2026-08-27
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/period-diary-privacy-first/id1021545958/reviews.md

## What is Period Diary?

Your Body. Your Data. Period.

Most cycle trackers profit from your most intimate health information. We built an app that does the exact opposite: complete, accurate cycle insights with zero compromises on your privacy.

Your reproductive health data is among the most sensitive information you possess. Most cycle tracking apps store your logs on cloud servers, sell data to third-party brokers, or use it for targeted advertising.

We built this app on a simple premise: Your Body. Your Data. Period.

Why Choose Complete Privacy?

100% On-Device Storage: Everything you log is saved locally on your iPhone. We do not host cloud servers, hold decryption keys, or have access to your health history.

No Account Required: Download and start logging immediately. No email registration, phone numbers, or social logins necessary.

Intelligent & Simple Cycle Tracking

Accurate Predictions: Get reliable forecasts for upcoming periods, fertile windows, and ovulation days.

Comprehensive Symptom Logging: Track cramps, mood swings, energy levels, skin changes, flow intensity, and custom notes.

Take complete control of your cycle health with 100% privacy and peace of mind.

## Key features

- 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

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Period. Premium Lifetime | $9.99 | one-time |


## What do users think of Period Diary?

Overall sentiment: mixed

**Pros**

- 🔒 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

**Cons**

- 🐛 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

**Commonly reported bugs**

- App crashes when opening calendar
- App crashes when trying to edit start dates
- Cannot set period end date in same month as start date
- Cannot log dates from previous months
- App freezes during countdown timer
- Premium purchase not registering after payment
- Restore purchase function not working
- Settings not persisting after changes
- Notifications settings not saving
- App crashes during initial setup
- Calendar glitches with date selection
- Auto-sets end date to current date instead of allowing edits
- Dark interface with poor text readability
- Notifications button crashes app when clicked
- Inconsistent app performance and stability

**Most requested features**

- Option to hide fertility tracking, show only period days
- Timezone selection capability
- Notes or symptom logging on calendar
- Clearer explanation of color coding system
- Support for irregular cycle adjustments
- Customizable tracking options for different body types
- Dark mode or adjustable contrast settings
- Localization for different countries and age groups
- Temperature tracking in Celsius and Fahrenheit
- Ability to edit past period entries
- More detailed symptom tracking options

## Recent user reviews (10 of 65)

All indexed reviews: https://appshunter.io/ios/app/period-diary-privacy-first/id1021545958/reviews.md

### 1/5 — App Issues

*2026-05-17*

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

### 3/5 — Simplicity Request

*2024-06-12*

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

### 3/5 — Slight problem

*2024-02-20, version 2.0.15*

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 🇦🇺😀

### 1/5 — Very basic

*2024-01-04*

Every time I try and open the calendar on this app it closes the app it is just too basic for me

### 5/5 — I love it

*2023-12-31*

I love this app because I use to have flo and it was a good app but it was a little bit complicated but this app is not complicated but I love it and every time it tells me exactly when I’m going to start my period and when I’m going to end it and so far it’s been right

### 1/5 — Not impressed

*2023-12-10, version 2.0.15*

I go to set up for first time and there is a giant add covering the whole screen, it was for a dating site.  the two people had their heads leaned into each other and they were both men! Which woman was that directed to? Totally immoral anyway seems tough to find normal things these days. Will not use a company that promotes immorality. Will keep looking for something wholesome.

### 2/5 — Not worth the premium price but good for a free app

*2023-12-08, version 2.0.15*

I like the aesthetic and good free I guess. I bought it and immediately regretted it because then the app kept crashing. I’ve requested for a refund. Not worth it

### 1/5 — NO

*2023-10-06, version 2.0.15*

DONT LIKE THIS APP

### 5/5 — Very simple like it should be

*2023-10-01*

I picked this app because the developer said your data doesn’t leave your phone. (Period math isn't so complex it needs to live on a server! I’m disturbed by all the other apps that take your info.) I was inclined to believe it because the the interface looked dignified and simple, made by one person and not a data mining company. App works great. I open the app to check when my period is supposed to start, I open to log when it does start, and I open to update the log to when it actually ended. You can adjust your standard period length and it will update its predicted dates, and if your period changes this month it will update future predictions accordingly.

### 1/5 — Too many ads

*2023-09-06, version 2.0.15*

The amount of ads that pop up when I’m just trying to log dates

## Frequently asked questions about Period Diary

### 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.

## Version history (last 5 releases)

### 3.1.0 — 2026-08-15

New features for all users:
- Ads completely removed
- Menstrual Cycle notifications free for everybody

Premium features:
- export your cycle logs with charts and tables for your doctor
- privacy lock the app with passcode
- generate more future predictions up to 12 months in advance

### 3.0.2 — 2026-08-11

Improvements for easier app navigation and UX.

### 3.0.1 — 2026-05-25

Improving the app for you, enhancing cycle predictions and design

### 3.0.0 — 2026-05-11

This update improves overall stability and performance, with refinements to cycle tracking and calendar readability.
Privacy remains core: no account required and your data stays on your phone.

### 2.0.15 — 2021-12-27

Design improvements are here!

Thank you for your comments and reviews, we appreciate it!

We are reading your comments and making fixes and improvements, this update reflects that - brings bug fixes and improvements. More updates will be coming soon. Stay healthy!

## Apps similar to Period Diary

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Period Tracker and Calendar](https://appshunter.io/ios/app/period-tracker-and-calendar/id1032267351) | 4.8 (53,648) | Free | Health & Fitness |
| [Moody Month: Hormone Tracker](https://appshunter.io/ios/app/moody-month-hormone-tracker/id1414905792) | 4.6 (881) | Free | Health & Fitness |
| [Period Tracker Period Calendar](https://appshunter.io/ios/app/period-tracker-period-calendar/id896501514) | 4.9 (172,779) | Free | Health & Fitness |
| [Cycle Tracker: Period Calendar](https://appshunter.io/ios/app/cycle-tracker-period-calendar/id1064911742) | 4.7 (1,301) | Free | Health & Fitness |
| [Cycles: Period & Cycle Tracker](https://appshunter.io/ios/app/cycles-period-and-cycle-tracker/id577187307) | 4.7 (26,743) | Free | Health & Fitness |
| [Clue Period & Cycle Tracker](https://appshunter.io/ios/app/clue-period-and-cycle-tracker/id657189652) | 4.8 (401,903) | Free | Health & Fitness |

## More apps by Sasa Kolda

- [Buzzer Said It: Custom Prank](https://appshunter.io/ios/app/buzzer-said-it-custom-prank/id1406002471)
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- [Three Little Things](https://appshunter.io/ios/app/three-little-things/id6752028768)
- [Say What U 8: Simple Calories](https://appshunter.io/ios/app/say-what-u-8-simple-calories/id6762486150)

All apps by Sasa Kolda: https://appshunter.io/developer/1673557983

## Related topics

[sasa kolda](https://appshunter.io/ios/topics/sasa-kolda)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-27.*