# RedCalendar vs Lu Period Tracker, Ovulation

The clearest difference is in-app purchases: RedCalendar at none against Lu Period Tracker, Ovulation's 7. RedCalendar also leads on ads (none vs shown) and review sentiment (100% vs 83%). Lu Period Tracker, Ovulation's advantage is update cadence (every 2 weeks vs every 3 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Lu Period Tracker, Ovulation sells 7 in-app purchases, starting at $1.99 per month. RedCalendar asks for nothing beyond the download.

RedCalendar ships an update every 3 months, Lu Period Tracker, Ovulation every 2 weeks. The most recent releases landed on October 29, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | RedCalendar | Lu Period Tracker, Ovulation |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.5 (89 ratings)](https://appshunter.io/ios/app/lu-period-tracker-ovulation/id6449603835/reviews)** |
| Number of ratings | — | **89** |
| Positive reviews | **100.0% of reviews** | 83.3% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | **Every 2 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 9 MB | 29 MB |
| Requires iOS | **15.4** | 16.0 |
| Devices | iPhone, iPod | iPhone, Apple Watch |
| Age rating | 4+ | 12+ |
| Developer | [Artem Bolotov](https://appshunter.io/developer/901756576) | [Artyom Abramov](https://appshunter.io/developer/974767261) |

## 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


### Lu Period Tracker, Ovulation

[App page](https://appshunter.io/ios/app/lu-period-tracker-ovulation/id6449603835)

Track your menstrual cycle and monitor your health with accurate predictions for your period. Record symptoms and cycle details to gain a comprehensive overview of your well-being and receive timely reminders. Access information quickly via widgets and Apple Watch, with secure data protection.

**Highlights:** Menstrual cycle tracking, Period and ovulation predictions, Symptom logging, Home and Lock screen widgets, Apple Watch app, Health app integration, Secure data with passcode/Face ID

**Features:** macOS Compatibility, Apple Watch app

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lu+ | $1.99 | per month |
| Lu+ | $6.99 | per year |
| Lu+ | $6.99 | per year |
| Lu+ | $9.99 | per year |
| Lu+ | $9.99 | per year |
| Lu+ | $9.99 | per year |
| Lu+ | $24.99 | one-time |


## Frequently asked questions

### Is RedCalendar free?

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

### Is Lu Period Tracker, Ovulation free?

Lu Period Tracker, Ovulation is free to download, with in-app purchases available.

### Do RedCalendar or Lu Period Tracker, Ovulation have ads?

Lu Period Tracker, Ovulation shows ads; RedCalendar does not.

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

RedCalendar ships an update every 3 months, and Lu Period Tracker, Ovulation every 2 weeks. Most recently, RedCalendar was updated on October 29, 2026 and Lu Period Tracker, Ovulation on October 24, 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.*