Comparison

RedCalendar vs Menstrual cycle tracker

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Menstruation prediction
  • Ovulation tracking
  • Fertile day identification
  • Customizable daily diary
  • Cloud-based data backup
  • Airplane mode functionality
  • Cycle analysis using median values
Read full description

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.

About

Menstrual cycle tracker

This app helps women track their menstrual cycles, predict ovulation, and record symptoms. It offers a simple interface for planning pregnancies, medical appointments, or travel, with data backup and reminders.

Highlights
  • Track periods and predict dates
  • Log ovulation and fertile days
  • Record symptoms and PMS data
  • Analyze cycle statistics with graphs
  • Receive period, PMS, and ovulation reminders
  • Secure data backup and import
Features
Read full description

Menstruation calendar - the simplest, and convenient application for women to track the menstrual cycle, their condition and symptoms on different days. Women's calendar will help you to plan pregnancy, medical examination, travel and avoid unpleasant surprises! In the application you can easily track the dates of menstruation, their regularity and duration. The application will tell you the estimated date of ovulation and fertile days for pregnancy planning. We tried to make our free women's calendar intuitive, with a minimalistic design and only with the most necessary features! With the Days menstrual calendar you can: • track your periods and get a forecast of start and end dates of your next periods (based on your own menstrual history) • track ovulation and cycle days, most favorable for pregnancy • choose a date for medical tests on certain days of the cycle • keep a period diary, recording PMS data and other important information for you on any day • analyze statistics using visual graphs of cycle length and menstruation length • Get reminders for your next period, PMS and ovulation. All data can be automatically backed up by simply logging into your account (Google, Apple, Fb). Data will not be lost when changing device - if you are logged in, the data is stored securely and can be imported to any smartphone if necessary. Our menstrual calendar was created to make a woman's life easier, help get rid of worries, track p. c., menstruation flow, ovulation period and other symptoms in a simple, convenient and visual form. You will be able to use Days to conceive a child by defining your fertility window and ovulation period The data you need about your menstrual cycle will always be at your fingertips during your doctor's visit. We offer subscription plans in the app that unlock premium functions of the app: 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 Price can depend on location For more information please visit the link https://support.apple.com/HT202039 Privacy Policy: https://doc.whisperarts.com/policy/days/ios/ Terms of Use: https://doc.whisperarts.com/terms/days/ios/ We always welcome your questions, suggestions and comments. Write to us at support@whisperarts.com

Screenshots

RedCalendar4 screens
Menstrual cycle tracker4 screens

Verdict

The call

The clearest difference is in-app purchases: RedCalendar at none against Menstrual cycle tracker's 5. RedCalendar also leads on ads (none vs shown) and iOS requirement (15.4 vs 17.0). On price, review sentiment, update cadence and device support 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Menstrual cycle tracker sells 5 in-app purchases, starting at $1.99 per month. RedCalendar asks for nothing beyond the download.

UpkeepUpdate frequency

RedCalendar ships an update every 3 months, Menstrual cycle tracker every 2 months. Both last shipped on November 3, 2026.

Scorecard4 real differences · 6 level
RedCalendar versus Menstrual cycle tracker: the parameters behind the verdict, then further details
ParameterRedCalendarMenstrual cycle tracker
PriceFreeFree
Rating—4.5 (40 ratings) — better
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings—40 — better
Update frequencyEvery 3 monthsEvery 2 months — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPod — betteriPhone
Requires iOS15.4 — better17.0
Further details — not scored
Size9 MB86 MB
Age rating4+12+
DeveloperArtem BolotovWhisper Arts

Customer experience

RedCalendar

Written reviews6 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Menstrual cycle tracker

All ratings40 ratings
Positive85.0%
Neutral7.5%
Negative7.5%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

RedCalendar

No in-app purchases

5 purchases

Menstrual cycle tracker

Subscriptions5
  • Subscription for month$1.991 Month
  • Subscription for 3 months$4.993 Months
  • Annual - Sale 50$4.991 Year
Show 2 more
  • Subscription for a year$9.991 Year
  • Subscription for 1 year7 Days trial$9.991 Year

Questions

Is RedCalendar free?
RedCalendar is free to download, with no in-app purchases.
Is Menstrual cycle tracker free?
Menstrual cycle tracker is free to download, with in-app purchases available.
Do RedCalendar or Menstrual cycle tracker have ads?
Menstrual cycle tracker shows ads; RedCalendar does not.
Which is updated more often, RedCalendar or Menstrual cycle tracker?
RedCalendar ships an update every 3 months, and Menstrual cycle tracker every 2 months. Most recently, RedCalendar was updated on November 3, 2026 and Menstrual cycle tracker on November 3, 2026.

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