# Period Cycle Calculator — Flow Cycle & Period Tracker

> Flow Cycle & Period Tracker (iPhone/iPad app by nguyen thanh.)

- Source: https://appshunter.io/ios/app/period-cycle-calculator/id6753979900 (this page in markdown: same URL + `.md`)
- Developer: [nguyen thanh](https://appshunter.io/developer/1481436893)
- Category: Health & Fitness, Medical
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 15.0 · 183 MB
- Languages: English, Vietnamese
- Released: 2026-03-25
- Data updated: 2026-08-23
- User reviews in markdown: https://appshunter.io/ios/app/period-cycle-calculator/id6753979900/reviews.md

## What is Period Cycle Calculator?

Period Cycle Calculatorr helps you easily track your menstrual cycle and predict upcoming periods, ovulation days, and fertile windows. With a simple and intuitive interface, the app makes it easy to understand your cycle and stay prepared every month.

Whether you want to monitor your cycle, plan ahead, or simply understand your body better, app provides reliable predictions based on your personal cycle data.

Key Features

• Period Prediction
Know when your next period is likely to start based on your cycle history.

• Ovulation & Fertile Window Calculator
Identify your ovulation days and fertile window to better plan or avoid pregnancy.

• Cycle Calendar
View your past and upcoming cycles in a clear and simple calendar.

• Easy Logging
Quickly record your period start dates to improve prediction accuracy.

• Simple & Private
Your data stays on your device and is only used to provide cycle predictions.

Designed for Simplicity

App is built to be lightweight and easy to use. Just enter the start date of your last period and your average cycle length, and the app will calculate:

Next period date

Ovulation day

Fertile window

Disclaimer

This app provides predictions based on the information you enter and should not be used as a medical or contraceptive tool. Always consult a healthcare professional for medical advice.

Terms of Use: https://devworldvn.com/term

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| One Month Premium | $9.99 | per month |
| 1 Year Premium | $59.99 | per year |
| One Week Premium | $2.99 | per 7 days |



## Version history (last 5 releases)

### 1.0.8 — 2026-08-20

Bug fixes and performance improvements

### 1.0.7 — 2026-07-29

Bug fixes and performance improvements

### 1.0.6 — 2026-06-24

Bug fixes and performance improvements

### 1.0.5 — 2026-06-01

Bug fixes and performance improvements

### 1.0.4 — 2026-05-30

Bug fixes and performance improvements

## Apps similar to Period Cycle Calculator

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [HerPhase – Period Tracker](https://appshunter.io/ios/app/herphase-period-tracker/id6759829011) | 5.0 (1) | Free | Health & Fitness |
| [Pregnancy Tracker - Flo Period](https://appshunter.io/ios/app/pregnancy-tracker-flo-period/id6742174780) | — | Free | Health & Fitness |
| [Vela- Period & Cycle Tracker](https://appshunter.io/ios/app/vela-period-and-cycle-tracker/id6760920536) | — | Free | Health & Fitness |
| [CycleLog Period](https://appshunter.io/ios/app/cyclelog-period/id6772134716) | — | Free | Health & Fitness |
| [Ovulation Tracker & Period App](https://appshunter.io/ios/app/ovulation-tracker-and-period-app/id6756785944) | — | Free | Health & Fitness |
| [Ovulation & Fertile Days](https://appshunter.io/ios/app/ovulation-and-fertile-days/id6760716692) | 4.0 (2) | Free | Health & Fitness |

## More apps by nguyen thanh

- [Sudoku ▢](https://appshunter.io/ios/app/sudoku/id1526012921)
- [GhostShot - Be Stronger Man](https://appshunter.io/ios/app/ghostshot-be-stronger-man/id1527234910)
- [Word of Wonders](https://appshunter.io/ios/app/word-of-wonders/id1532245305)
- [Word tag](https://appshunter.io/ios/app/word-tag/id1533978093)
- [Stock x Investor](https://appshunter.io/ios/app/stock-x-investor/id1551616294)
- [Smart - Thách thức thông minh](https://appshunter.io/ios/app/smart-thach-thuc-thong-minh/id1551752289)

All apps by nguyen thanh: https://appshunter.io/developer/1481436893

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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 2026-08-23.*