Comparison

Selene vs Rainbow data

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

Head to head
About

Selene

This app helps you understand your body's natural cycles by tracking your period, basal body temperature, and ovulation. It offers simple logging and beautiful visualizations to help you manage your health and fertility.

Highlights
  • Period cycle management
  • Basal body temperature tracking
  • Ovulation prediction
  • Cervical mucus tracking
  • Simple logging with haptic feedback
  • Data sync with Health app
  • Beautiful calendar and graph views
Features
Read full description

Selene - Simple & Beautiful Period Tracker Understand your body's rhythm and make every day more comfortable. Selene provides period tracking, BBT recording, and ovulation prediction with a simple and intuitive design. [Main Features: All Free] Period Cycle Management • Just record your period — cycles are automatically calculated. Automatic prediction of your next period • Visualize past cycle data clearly • Understand cycle variation patterns Basal Body Temperature (BBT) Tracking • Track daily BBT with easy-to-read graphs • Predict ovulation from temperature changes • Perfect for those trying to conceive • Morning assist feature for instant recording Ovulation Prediction • Automatic calculation of ovulation day from cycle data • Display fertile window on calendar • Visualize your body's rhythm Cervical Mucus Tracking • Record your cervical mucus status in detail • Understand changes across your cycle Simple Logging • Easy recording of period, BBT, weight, cervical mucus, intercourse, and pill intake • Comfortable input with haptic feedback • Track only what you need • Data sync with Health app Beautiful Visuals • Clear calendar view • Easy-to-understand graphs and charts [Selene PLUS Features] (1 Month Free Trial) Upgrade to PLUS plan for even more powerful features: Weight Graphs • Track weight changes alongside your cycle • Understand weight fluctuation patterns by cycle phase Multiple View Layouts • Cycle View - Detailed analysis of each cycle • Quarterly View - See patterns over 3 months • Half-Yearly View - Check long-term trends • Yearly View - Overview of annual data Unlimited History Access • Access up to 50 years of historical data • Perfect for long-term health management • Data export feature (Coming Soon) [Perfect For] • Want to track period cycles accurately • Trying to conceive and want to know ovulation day • Record BBT for health management • Looking for a simple and easy-to-use app • Value your privacy • Want to manage long-term health data Note: Prediction results are for reference purposes only. Please consult healthcare professionals for important decisions. [Privacy Protection] Your data is completely protected: • All data stored securely on your device • No data sharing with third parties • Passcode lock support (Coming Soon) • Use with confidence ※ Auto-renewal can be changed anytime in Apple ID account settings ※ After free trial ends, automatically converts to paid plan [Download Now] Start understanding your body's rhythm and living a healthier life with Selene. --- Privacy Policy: https://www.iubenda.com/privacy-policy/7872296 Terms of Service: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ For questions or feedback, please contact us from the app settings.

About

Rainbow data

Features
Read full description

The fertility data tracker for data geeks. Rainbow Data will help you: - Track your cycle and predict ovulation if you are trying to conceive naturally - Track your Basal body temperature (BBT) and detect ovulation based on charting, ovulation tests or lab tests - Schedule drug and supplement reminders and track their usage - Record, review and analyse lab test results - Build a full picture of your fertility data - Enjoy a beautiful and minimal design!

Screenshots

Selene4 screens
Rainbow data4 screens

Verdict

The call

The clearest difference is in-app purchases: Rainbow data at none against Selene's 1. Rainbow data also leads on iOS requirement (13.0 vs 17.0). On price, update cadence, ads 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. Selene sells 1 in-app purchase, starting at $9.99 per year. Rainbow data asks for nothing beyond the download.

UpkeepUpdate frequency

Selene ships an update monthly, Rainbow data every 3 weeks. Both last shipped on October 29, 2026.

Scorecard2 real differences · 8 level
Selene versus Rainbow data: the parameters behind the verdict, then further details
ParameterSeleneRainbow data
PriceFreeFree
Rating4.0 (5 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings5 — better—
Update frequencyMonthlyEvery 3 weeks — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreemium—
DevicesiPhoneiPhone, iPod — better
Requires iOS17.013.0 — better
Further details — not scored
Size51 MB29 MB
Age rating12+17+
DeveloperSatomi FurusawaVarious MB

In-app purchases

1 purchases

Selene

Subscriptions1
  • Selene PLUS1 Month trial$9.991 Year
None

Rainbow data

No in-app purchases

Questions

Is Selene free?
Selene is free to download, with in-app purchases available.
Is Rainbow data free?
Rainbow data is free to download, with no in-app purchases.
Do Selene or Rainbow data have ads?
Neither Selene nor Rainbow data shows ads.
Which is updated more often, Selene or Rainbow data?
Selene ships an update monthly, and Rainbow data every 3 weeks. Most recently, Selene was updated on October 29, 2026 and Rainbow data on October 29, 2026.

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