Report updated Jun 5, 2026
Period & Ovulation Calculator
For women tracking menstrual cycles for health awareness or family planning purposes.
Period & Ovulation Calculator is a well-regarded health & fitness app that is free with in-app purchases. With a 4.1/5 rating from 1.3K reviews, it maintains solid user satisfaction. Users particularly appreciate accurate cycle predictions and fertility tracking provide significant value for users planning conception journeys, though excessive advertisement frequency disrupts the user experience and creates frustration during daily navigation remains a common concern.
What is Period & Ovulation Calculator?
Period & Ovulation Calculator is a cycle and fertility tracking app for women, available on iOS and Android.
Users hire this app for low-friction cycle logging and pregnancy planning, seeking a simple alternative to complex medical-grade trackers.
Current Momentum
v1.2 · 8mo ago
Maintenance- Shipped notification support in latest release.
- Expanded market presence in African regions.
Active Nemesis
Clue Period & Cycle Tracker
By BioWink
Other Rivals
7-Day Rank Pulse 🇺🇸
Health & FitnessNo ranking data
Rating Pulse 🇺🇸
Recent User Mood
What makes this app unique?
What Does It Look Like?
What Are The Key Features?
Predicts upcoming period, ovulation dates, and fertile windows based on user-inputted cycle data
Secures sensitive health and cycle data with a user-defined passcode
Calculates expected labor dates and monitors pregnancy progress post-conception
Unlocks advanced app features via monthly or yearly recurring billing
How much does it cost?
- Free tier with ad support
- Premium subscription with monthly or yearly billing
Freemium model utilizes ad-supported free access to drive volume, with a subscription gate for advanced features.
Who Built It?
AESTHETIC WIDGETS
Providing expectant parents and individuals with specialized health utilities for pregnancy tracking and menstrual cycle monitoring.
Portfolio
2
Apps
What other apps does AESTHETIC WIDGETS make?
Explore the full AESTHETIC WIDGETS report
Portfolio breakdown, audience, momentum, and every app published by AESTHETIC WIDGETS.
What do users think recently?
Low confidence · 6 reviews analyzed
How did the latest release land?
What is the recent mood?
Recent user voice shows a excited sentiment. Users appreciate accurate cycle predictions and fertility tracking provide significant value for users planning conception journeys and clean and accessible interface design makes daily cycle logging feel simple and highly intuitive, but report excessive advertisement frequency disrupts the user experience and creates frustration during daily navigation.
Limited review volume (6 reviews). Sentiment analysis will deepen as more data lands.
View the full user-sentiment analysis
Mood gauge, ratings & review-volume history, every praise / complaint / request, and sentiment over time.
What is the competitive landscape for Period & Ovulation Calculator?
How's The Health & Fitness Market?
How does it evolve in the Health & Fitness market?
The app holds a 4.4 rating on iOS and 3.8 on Android, with recent expansion into new markets like DZ and TZ. The 0.6-star platform gap indicates inconsistent performance or ad-load experience between operating systems.
Rank progression
7 active rankings tracked — 30-day window
Which niche is Period & Ovulation Calculator in?
to track menstrual cycles and fertility windows
Explore the full Period Tracking Trackers niche
Every app in this space — 35 tracked, the niche's live rankings, and Marlvel's editorial take on the job-to-be-done.
The rivals identified
Nemeses(1)
With nearly 400,000 reviews and a high-velocity release cadence, Clue dominates the market through a science-backed, medical-grade positioning that sets the industry standard.
Differentiators
- Maintains a medically-focused, clinical interface that prioritizes data accuracy over casual aesthetic tracking features.
- Operates a high-frequency release cycle with 18 updates in six months, signaling rapid feature iteration.
- Leverages a strong brand-as-category identity that makes it the default choice for privacy-conscious users.
Head to head
The target app should pivot toward a 'simplified wellness' niche to avoid direct feature-for-feature competition with Clue's clinical dominance.
Contenders(3)
Captures a distinct demographic through a unique, astrology-integrated UX that differentiates it from standard health trackers.
Differentiators
- Integrates astrological cycle tracking to provide a unique, personality-driven user experience beyond standard health metrics.
- Targets a younger, lifestyle-oriented audience by blending health data with personalized, engaging daily content.
Long-standing market presence provides a stable, reliable alternative for users seeking a traditional, no-frills tracking experience.
Differentiators
- Provides a mature, battle-tested feature set that prioritizes stability and long-term data consistency for power users.
- Maintains a classic UI paradigm that appeals to users who dislike the modern, subscription-heavy design trends.
A massive user base and high rating suggest this app excels at the core 'period calendar' job-to-be-done.
Differentiators
- Focuses on a high-utility, calendar-first visualization that allows users to see cycle history at a glance.
- Optimized for rapid logging, reducing the friction of daily data entry compared to more complex trackers.
Same space(2)
The most technically robust option for users who require advanced charting and data analysis for fertility.
Differentiators
- Offers advanced charting tools and data analysis that cater to users tracking complex fertility patterns.
- Maintains an extremely high release velocity, ensuring the platform remains compatible with the latest OS features.
Focuses specifically on the fertility-planning sub-niche, serving users with a higher intent to conceive.
Differentiators
- Deeply integrates with physical hardware like BBT thermometers to provide objective, data-driven ovulation confirmation.
- Positions itself as a fertility-first tool rather than a general-purpose menstrual cycle tracker.
Compare Period & Ovulation Calculator against every rival
All rivals in one side-by-side table — identity, store metrics, ratings & sentiment, and strategic intel — plus a head-to-head page for each.
The outtake for Period & Ovulation Calculator
Strengths to defend, gaps to attack
Core Strengths
- Lightweight interface reduces logging friction for casual users
- Pin Lock protection builds necessary trust for sensitive health data
Critical Frictions
- Excessive ad frequency disrupts daily navigation
- 0.6-star Android-iOS rating gap on majority Android base
Growth Levers
- Develop B2B partnerships with wellness clinics to move beyond ad-supported revenue
- Introduce wearable data syncing to compete with hardware-integrated rivals
Market Threats
- Clue's high-velocity release cadence threatens to make this app feel obsolete
- Tightening data-privacy regulations may impact ad-based monetization models
What are the next best moves?
Pivot ad-frequency to a rewarded-video model because ad-disruption is the top complaint → increase retention
User sentiment analysis identifies excessive ads as the primary friction point for daily users.
Trade-off: Pause the premium-feature rollout to focus engineering on ad-logic refactoring.
Audit Android performance because the 0.6-star rating gap suggests platform-specific stability issues → stabilize ratings
The Android rating of 3.8 lags significantly behind the iOS rating of 4.4.
Trade-off: Delay the new pregnancy-tracking UI update to prioritize Android stability fixes.
A counter-intuitive read
The app's lack of medical-grade depth is a feature, not a bug, as it captures the casual-user segment that finds clinical-grade trackers like Clue overly intimidating.
Feature Gaps vs Competitors
- Hardware integration (available in Premom but absent here)
- Advanced clinical data analysis (available in Fertility Friend but absent here)
Key Takeaways
The app maintains a functional core for cycle tracking, but the high ad-frequency risks long-term churn to clinical-grade rivals, so the PM should prioritize ad-load reduction to stabilize retention.
Where Is It Heading?
Mixed Signals
The casual cycle-tracking market is consolidating around specialized, high-trust platforms, leaving general-purpose apps exposed to churn. Future growth depends on balancing ad-supported volume with a more premium, less intrusive user experience.
Excessive ad frequency in the latest release drives user frustration, which compounds the rating drag already visible on Android.
Recent notification support additions improve daily engagement, signaling active feature investment rather than maintenance mode.