Comparison

MyDays X vs Harmony

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

Head to head
About

MyDays X

This app helps women track their menstrual cycles, predict fertile days, and monitor various health symptoms. It offers intelligent notifications, a community chat, and detailed tracking options for a comprehensive overview of reproductive health.

Highlights
  • Period and ovulation prediction
  • Fertile day tracking
  • Symptom and mood logging
  • Pregnancy mode
  • Community chat
  • Birth control tracking
  • Password lock
Features
Read full description

MyDays X - The Original Period & Ovulation Calendar to track your Cycle Days -- I love it — Really! Congratulations! Out of 100,000+ apps, MyDays X has been selected by leading doctors as a top health app. Based on its medical accuracy, its utility in supporting health or healthy living goals, and usability, MyDays X has received the award from HealthTap AppRx Top Health and Medical Apps reports. *** MyDays X predicts your fertile days and your next periods *** • ""Intelligent Notifications"" based on your Location and Time • Great Community Chat to share your Experience with other Users • Pregnancy Mode • Track more than 20 Symptoms and remember your Breast Self examination • Optional manual entry of your Ovulation days and next period prediction • Track when you had sex (how often, protected/unprotected) • Keep an eye on your blood flow and mood. • embedded eMail support for your cycle History to your doctor • Backup/Restore via MyDays Cloud Backup, Email or WiFi MyDays X - Period & Ovulation Calendar is the simplest way to track your female data. • NuvaRing and any other birth Control based on Insert/Remove after x Days • Partneremail, email your Partner how u felt in the last days and whats coming next • Disable Daily Options, for example for kids or when you don't like to come pregnant Simpler, Better, More Features and the best Community • See the possible gender your baby may be • Track your Cervix position, openness, firmness & feeling • Track OPK Results (negative, fertile, peak/ovulation) • Visualize Moon-phases The new MyDays ROCKS! More innovative features than ever! • Password Lock for your Security • Add the actual cycle day to the calendar days • Disable the predictions for period or ovulation on the calendar • Filter what you like to see in your History List (eg. only Data from 2014) • Multi User (track yourself, your daughter or close friend) 
 • Create your own Calendar Themes! 
 • Add text notes - remember if you took your pill • Overwrite the predicted ovulation with your manual set day • Adjustable Luteal phase • Option to see old predictions 
 • Reset preferences and data should you lost overview • Rename Symptoms Fields for your Needs • Get an overview by Chart for your temperature (BMT) and weight measures • Choose the start day of the week • Cycle and Period Length can be calculated automatically • Unit Measures in Kg/Lbs/Stone Celsius/Fahrenheit 
 • More than 20 Languages ---------------------------------------- MyDays, the easy tracking & prediction calendar for your period, ovulation and fertility. -------- 
Remember: 
MyDays does pinpoint the 'high fertile' days. However, you can become pregnant also on other days! Usage is your own responsibility. For more Help & Hint, see Preferences -> About -> Visit MyDays - Homepage -------- • It's totally FREE with advertising, or you can use one of our subscriptions to go completely AD FREE and enable PRO mode. MyDaysX TERMS OF USE can we found at link below: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Harmony

This app helps you understand and sync your lifestyle with your natural body rhythms. It offers personalized guidance for energy, meals, movement, and mindset based on your cycle phase. It also includes smart tracking, daily insights, and an AI assistant for daily organization and self-awareness.

Highlights
  • Cycle Syncing Guidance
  • Smart Cycle Tracking
  • Daily Insights & Rituals
  • AI Lifestyle Assistant
  • Partner Connection
  • Privacy-Focused Data
Read full description

More than a period tracker. Harmony helps you sync your lifestyle with your cycle. Your energy, meals, movement, and mindset, all in one place. Your body follows a unique rhythm that shapes how you feel, move, and think. Harmony helps you understand it and work with it, not against it. Most cycle apps track your period. Harmony helps you live better because of it. What Harmony offers: - Cycle Syncing Guidance Personalized tips for each phase of your cycle. What to eat, how to move, and how to recharge based on where you are right now. - Smart Cycle Tracking Log your period, symptoms, and mood. Get a clear view of your current phase and what's coming next. - Daily Insights & Rituals Meditations, journaling prompts, and mindset tips aligned with your natural rhythm. - AI Lifestyle Assistant Friendly, personalized guidance to help you stay organized and in tune with yourself every day. - Harmony Together Connect with your partner so they can better understand and support your cycle. - Your data stays yours. Built with privacy at its core. We never sell your data. Ever. Harmony is a lifestyle and wellness tool. It does not provide medical advice or diagnoses. Start with a free trial and find your rhythm. Web: https://harmony-cycle.app Terms of Use: https://legal.rocapine.com/terms Privacy Policy: https://legal.rocapine.com/privacy

Screenshots

MyDays X4 screens
Harmony4 screens

Verdict

The call

The clearest difference is rating: Harmony at 4.7 against MyDays X's 3.2. Harmony also leads on ratings volume (10K vs 759). MyDays X's advantage is review sentiment (54% vs 36%) and device support (3 vs 1). On price, update cadence, ads and in-app purchases 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. MyDays X sells 7 in-app purchases, starting at $7.99 per month and Harmony sells 13 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Harmony holds the better App Store score, 4.7 against 3.2. That said, the two scores are not equally well evidenced: Harmony has 10K ratings behind it against 759, so its average is the more settled of the two. Written reviews complicate that: 54% of MyDays X's written reviews are positive against 36% of Harmony's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

MyDays X ships an update weekly, Harmony every 6 days. The most recent releases landed on October 26, 2026 and October 27, 2026 respectively.

Scorecard5 real differences · 5 level
MyDays X versus Harmony: the parameters behind the verdict, then further details
ParameterMyDays XHarmony
PriceFreeFree
Rating3.2 (759 ratings)4.7 (10K ratings) — better
Positive reviews53.8% of reviews — better35.8% of reviews
Number of ratings75910K — better
Update frequencyWeeklyEvery 6 days — better
AdsYesYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS13.0 — better16.4
Further details — not scored
Size51 MB180 MB
Age rating12+4+
DeveloperChristian MuellerRocapine

Customer experience

MyDays X

All ratings756 ratings
Positive49.9%
Neutral10.2%
Negative39.9%
Written reviews502 reviews
Positive53.8%
Neutral9.2%
Negative37.1%

Harmony

All ratings10,059 ratings
Positive93.1%
Neutral4.1%
Negative2.8%
Written reviews453 reviews
Positive35.8%
Neutral6.4%
Negative57.8%

User reviews

MyDays X

From 759 App Store ratings

What we love

  • ⭐ Accurate period and ovulation tracking
  • 📆 Helpful for planning and conceiving
  • 💻 Easy to use and navigate
  • 🗓️ Customizable tracking options
  • 🔍 Detailed history and data insights

Room to improve

  • 💢 Excessive and intrusive ads
  • ⏱️ Long ad wait times disrupting usage
  • 🐛 Crashes and bugs after updates
  • 🔒 Privacy concerns with location tracking
  • 🔄 Difficulty transferring data to new devices

Harmony

From 10K App Store ratings

What we love

  • 👍 Empowering experience
  • 🚀 Easy to use
  • 💡 Personalized insights
  • 👍 Helpful for managing cycle
  • 👍 Informative and useful

Room to improve

  • 🐛 Inaccurate calendar and period tracking
  • 💰 Paid subscription required
  • 🔧 Needs more customization options
  • 👎 Issues with selecting period dates

Bugs and requests

MyDays X

Reported bugs

4 issues
  • App crashing on launch after updates
  • Calendar and data not syncing correctly
  • Inaccurate ovulation and period predictions
  • Inability to access historical data

Requested features

5 requests
  • Pregnancy mode to maintain data accuracy
  • Symptom tracking beyond just mood and weight
  • Improved ad-free or reduced ad experience
  • Better data export and backup options
  • Integration with health tracking platforms

Harmony

Reported bugs

2 issues
  • Calendar issues with incorrect period dates
  • Inability to select accurate period dates

Requested features

3 requests
  • More community features
  • Longer meditation exercises
  • Additional recipes and meal plans

In-app purchases

7 purchases

MyDays X

Subscriptions3
  • 1 Month Ad Free$7.991 Month
  • 3 months Ad free$19.993 Months
  • 1 Year Ad Free7 Days trial$29.991 Year
One-time4
  • Lifetime Ad free Mega Offer 3$32.99
  • Lifetime Ad free Super Offer$34.99
  • Lifetime Ad free offer$39.99
Show 1 more
  • Lifetime Ad free$79.99
13 purchases

Harmony

Subscriptions13
  • Premium Subscription$4.997 Days
  • Harmony Monthly Plan$9.991 Month
  • Monthly Subscription$14.991 Month
Show 10 more
  • Harmony Premium Pan$14.991 Month
  • Harmony Yearly Plan7 Days trial$34.991 Year
  • Yearly Premium1 Year trial$34.991 Year
  • Harmony Yearly Plan2 variants$34.991 Year
  • Harmony Premium7 Days trial$39.993 Months
  • Premium Subscription$39.996 Months
  • Yearly Subscription7 Days trial2 variants$49.991 Year
  • Yearly Subscription7 Days trial$59.991 Year
  • Harmony Yearly Plan7 Days trial$79.991 Year
  • Harmony Yearly Plan7 Days trial$89.991 Year

Questions

Is MyDays X free?
MyDays X is free to download, with in-app purchases available.
Is Harmony free?
Harmony is free to download, with in-app purchases available.
Which has better reviews, MyDays X or Harmony?
Harmony is rated higher. MyDays X averages 3.2 out of 5 from 759 ratings, while Harmony averages 4.7 from 10K ratings.
Do MyDays X or Harmony have ads?
Both MyDays X and Harmony show ads.
Which is updated more often, MyDays X or Harmony?
MyDays X ships an update weekly, and Harmony every 6 days. Most recently, MyDays X was updated on October 26, 2026 and Harmony on October 27, 2026.

Other comparisons