RedCalendar vs Lu Period Tracker, Ovulation
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
RedCalendar
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.
- Menstruation prediction
- Ovulation tracking
- Fertile day identification
- Customizable daily diary
- Cloud-based data backup
- Airplane mode functionality
- Cycle analysis using median values
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Try our app for following your cycle: analysis and predictions for periods, ovulation and fertile days. We won’t ask you to rate your mood swings, drink water, or look at your step count and hours of sleep. But you can note anything you like about any day, if you want to yourself. The app is cloud-based: no need to think about backups or space in iCloud. If it comes to it, RedCalendar works in airplane mode too, so you can add your data and sync it later, once you’re back online. One account works on several devices, and you sign in with email. ANALYSIS AND PREDICTIONS We use the median of the data you enter to work out your cycle. It’s better than the average, and more honest than talk of artificial intelligence. The app adapts to you: cycle length and period length are refined from the cycles you’ve recorded most recently, and once you confirm a day of ovulation, it counts towards the prediction too. While there are only a few recorded cycles, the app keeps the values you set yourself. You can change them in settings at any time. EVERY DAY Any day opens with a tap right in the calendar. Mark the start and end of your period, note the flow, confirm ovulation or pick its day yourself, leave a comment. REMINDERS We send notifications at 9:00 and only when there’s a reason: 2 days before your cycle starts, a day after your period ends (in case you forgot to mark it), and 4 days before expected ovulation. If you’ve gone on holiday and your time zone has changed, just open the app — it takes care of the rest. Notifications are turned off with a single switch in settings. TAGS Use tags to add anything else about your day. Just pick one or several and keep track of workouts, mood or new habits. You can create and rename your own tags. STATISTICS If you want more numbers: cycle length, period length and your cycle history over 6 months, a year or all time. APPEARANCE Three accent colors and a dark theme.
Lu Period Tracker, Ovulation
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.
- 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
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Lu is an app that can assist you in keeping track of your menstrual cycle and monitoring your overall health. It enables you to make accurate predictions about the beginning and end of your period, as well as track any changes in your body during each cycle. You can record details like the heaviness of your menstruation and any related symptoms. By tracking your well-being and symptoms, you can obtain a comprehensive overview of your health and be able to visit a doctor promptly if necessary. - Use widgets on your Home and Lock screens or the Apple Watch for quick cycle info. - Securely restrict access to your data with passcode and Face ID. - Easily add new menstrual cycle and symptom records using the app on Apple Watch, even when you're away from your phone. - Synchronize your records seamlessly with the "Health" app and across your devices via iCloud. - Receive reminders for your upcoming menstrual period and customize app icon and notifications style for privacy. Whether you need to track your menstrual cycle or want to understand your health better, Lu is here to help! Download Lu for free today and start monitoring your health. Please remember, Lu's predictions are not meant to be used as a form of birth control. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | RedCalendar | Lu Period Tracker, Ovulation |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.5 (89 ratings) — better |
| Positive reviews | 100.0% of reviews — better | 83.3% of reviews |
| Number of ratings | — | 89 — better |
| Update frequency | Every 3 months | Every 2 weeks — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPod | iPhone, Apple Watch |
| Requires iOS | 15.4 — better | 16.0 |
| Further details — not scored | ||
| Size | 9 MB | 29 MB |
| Age rating | 4+ | 12+ |
| Developer | Artem Bolotov | Artyom Abramov |
Customer experience
RedCalendar
Lu Period Tracker, Ovulation
In-app purchases
RedCalendar
No in-app purchases
Lu Period Tracker, Ovulation
- Lu+$1.991 Month
- Lu+$6.991 Year
- Lu+7 Days trial$6.991 Year
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- Lu+$9.991 Year
- Lu+7 Days trial$9.991 Year
- Lu+1 Month trial$9.991 Year
- Lu+$24.99
Questions
Is RedCalendar free?
Is Lu Period Tracker, Ovulation free?
Do RedCalendar or Lu Period Tracker, Ovulation have ads?
Which is updated more often, RedCalendar or Lu Period Tracker, Ovulation?
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