# Period Calculator — Menstrual Cycle

> Estimates menstrual cycle and ovulation days with saved calculation history. (iPhone/iPad app by Phan Nhat Đang.)

- Source: https://appshunter.io/ios/app/period-calculator/id1621982810 (this page in markdown: same URL + `.md`)
- Developer: [Phan Nhat Đang](https://appshunter.io/developer/1437390098)
- Category: Health & Fitness, Utilities
- Price: Free with in-app purchases
- Rating: 3.00/5 from 4 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.0 · 2 MB
- Languages: American English, Czech, Danish, Dutch, Finnish, Canadian French, German (Germany), Indonesian, Italian, Japanese and 12 more
- Released: 2022-10-06
- Data updated: 2026-08-19
- Monetization: freemium
- User reviews in markdown: https://appshunter.io/ios/app/period-calculator/id1621982810/reviews.md

## What is Period Calculator?

Period Calculator helps you estimate and track your menstrual cycle in a simple way.

You can calculate expected period dates, save results, and review cycle changes over time. The app is designed to be clear, easy to use, and convenient for everyday cycle tracking.

Disclaimer:
The results in this app are for reference only. They are not medical advice, diagnosis, or treatment. This app is not a medical device and should not replace advice from a qualified healthcare professional. Do not rely on this app for medical decisions, pregnancy prevention, or fertility planning. The developer is not responsible for any decisions, outcomes, losses, or damages resulting from use of the app or reliance on its results.

SUBSCRIPTION INFORMATION
This subscription package offers users unlimited access to all app features throughout the subscription period. 

• Payment will be charged to iTunes Account at confirmation of purchase.
• Subscription automatically renews unless auto-renew is turned off at least 24 hours before the end of the current period.
• Account will be charged for renewal within 24 hours prior to the end of the current period, and identify the cost of the renewal.
• Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase.
• Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable.

Privacy Policy: https://13520178.github.io/periodcalculator/policy.html
Terms of Use: https://13520178.github.io/periodcalculator/terms.html

## Key features

- Period day estimation
- Ovulation day prediction
- Save calculation results
- Intuitive and simple interface
- Free trial period

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Annual Premium Package | $3.99 | per year |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Unlock all features | $1.99 | one-time |


## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/period-calculator/id1621982810/reviews.md

### 1/5 — Worst app ever

*2024-08-14*

And not only that you have to pay in order to use it lol and it’s not even good

## Frequently asked questions about Period Calculator

### Does Period Calculator have ads?

No, Period Calculator does not contain advertisements. It is ad-free, allowing for an uninterrupted user experience.

### What is the rating for Period Calculator?

Period Calculator has a rating of 3.0 stars from 4 ratings. This indicates a mixed reception from its current user base.

### How much does Period Calculator cost?

Period Calculator is free to download and use. It offers a premium subscription package for unlimited access to all features.

### What subscription options are available for Period Calculator?

Period Calculator offers an Annual Premium Package for $3.99 per year, which includes a 7-day free trial. This subscription provides unlimited access to all app features.

### What devices is Period Calculator compatible with?

Period Calculator is compatible with iPhone, iPad, and iPod devices. It is designed for iOS users.

### How often is Period Calculator updated?

The latest version of Period Calculator is 2.1.0, last updated on April 29, 2026. This suggests a recent update, though the exact update frequency is not specified.

### What is the age rating for Period Calculator?

Period Calculator has an age rating of 4+. This means it is suitable for children aged 4 and older, indicating minimal mature content.

### Can I manage my Period Calculator subscription?

Yes, subscriptions for Period Calculator may be managed by the user. Auto-renewal can be turned off by going to the user's Account Settings after purchase.

## Version history (last 5 releases)

### 2.2.0 — 2026-08-07

Bug fixes and performance improvements

### 2.1.0 — 2026-04-29

Bug fixes and performance improvements

### 2.0.1 — 2026-04-13

Bug fixes and performance improvements

### 2.0.0 — 2023-11-29

Bug fixes and performance improvements

### 1.2.0 — 2023-08-15

Bug fixes and performance improvements

## Apps similar to Period Calculator

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Period Tracker Period Calendar](https://appshunter.io/ios/app/period-tracker-period-calendar/id896501514) | 4.9 (172,779) | Free | Health & Fitness |
| [Period Tracker and Calendar](https://appshunter.io/ios/app/period-tracker-and-calendar/id1032267351) | 4.8 (53,648) | Free | Health & Fitness |
| [Life - Period Tracker Calendar](https://appshunter.io/ios/app/life-period-tracker-calendar/id703547387) | 4.8 (62,793) | Free | Health & Fitness |
| [Cycle Tracker: Period Calendar](https://appshunter.io/ios/app/cycle-tracker-period-calendar/id1064911742) | 4.7 (1,301) | Free | Health & Fitness |
| [Period & Ovulation Calculator](https://appshunter.io/ios/app/period-and-ovulation-calculator/id1603182312) | 4.4 (611) | Free | Health & Fitness |
| [Clue Period & Cycle Tracker](https://appshunter.io/ios/app/clue-period-and-cycle-tracker/id657189652) | 4.8 (401,572) | Free | Health & Fitness |

## More apps by Phan Nhat Đang

- [Compound Interest Calc: Growth](https://appshunter.io/ios/app/compound-interest-calc-growth/id1437390099)
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- [Auto Loan Calculator - Car](https://appshunter.io/ios/app/auto-loan-calculator-car/id1487930075)
- [Mortgage Calculator: Payment](https://appshunter.io/ios/app/mortgage-calculator-payment/id1489668528)

All apps by Phan Nhat Đang: https://appshunter.io/developer/1437390098

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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 2026-08-19.*