# RedCalendar vs Period Tracker

The clearest difference is ads: RedCalendar at none against Period Tracker's shown. RedCalendar also leads on monetization model (free vs free with in-app purchases). Period Tracker's advantage is iOS requirement (12.0 vs 15.4). On price, review sentiment, update cadence and in-app purchases there is nothing between them.

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

RedCalendar ships an update every 3 months, Period Tracker every 6 weeks. The most recent releases landed on October 29, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | RedCalendar | Period Tracker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.9 (151 ratings)](https://appshunter.io/ios/app/period-tracker-ovulation-app/id6474987580/reviews)** |
| Number of ratings | — | **151** |
| Positive reviews | **100.0% of reviews** | 96.1% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | **Every 6 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 9 MB | 43 MB |
| Requires iOS | 15.4 | **12.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Artem Bolotov](https://appshunter.io/developer/901756576) | [Prutvi](https://appshunter.io/developer/1722991282) |

## What reviewers say

### RedCalendar

[App page](https://appshunter.io/ios/app/redcalendar-cycle-tracker/id1535523842)

Track your menstrual cycle, predict periods, and identify fertile days. This cloud-based diary allows for custom daily entries and syncs data even in airplane mode. Receive timely reminders for key cycle events.

**Highlights:** Menstruation prediction, Ovulation tracking, Fertile day identification, Customizable daily diary, Cloud-based data backup, Airplane mode functionality, Cycle analysis using median values

**In-app purchases:** none


### Period Tracker

[App page](https://appshunter.io/ios/app/period-tracker-ovulation-app/id6474987580)

This app helps women track their menstrual cycles, predict ovulation, and monitor fertility. It offers customizable themes, data privacy features, and insights into PMS symptoms and overall wellness. Plan your life with accurate predictions and a secure, personalized experience.

**Highlights:** Period and ovulation prediction, Fertile window tracking, PMS symptom logging, Customizable themes, Data security and privacy, Cycle trend analysis, Health diary

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is RedCalendar free?

RedCalendar is free to download, with no in-app purchases.

### Is Period Tracker free?

Period Tracker is free to download, with no in-app purchases.

### Do RedCalendar or Period Tracker have ads?

Period Tracker shows ads; RedCalendar does not.

### Which is updated more often, RedCalendar or Period Tracker?

RedCalendar ships an update every 3 months, and Period Tracker every 6 weeks. Most recently, RedCalendar was updated on October 29, 2026 and Period Tracker on October 30, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*