| Core Identity |
| Developer | GP Apps | Glow | Beesoft Apps | Malang Studio Co. Ltd, | Air Apps Systems | Flask LLP | Seoul National University Bundang Hospital | 倩 赵 | Wild Technologies AI | Elsa George |
| Category | Health & Fitness | Health & Fitness | Health & Fitness | Health & Fitness | Health & Fitness | Health & Fitness | Medical | Medical | Health & Fitness | Health & Fitness |
| Platform | Android, iOS | iOS, Android | Android, iOS | iOS, Android | iOS, Android | Android, iOS | iOS | iOS, Android | iOS | iOS |
| Store Metrics |
| Rating | 4.8 / 5 | 4.7 / 5 | 4.0 / 5 | 3.7 / 5 | 2.0 / 5 | 4.4 / 5 | 5.0 / 5 | 4.5 / 5 | 4.5 / 5 | 0.0 / 5 |
| Ratings Count | 73,195 | 114,018 | 3,808 | 84 | 1 | 756 | 1 | 1,183 | 386 | 0 |
| Price | Free | Free | Free | Free | Free | Free | Free | $0.99 | Free | Free |
| Release Date | Oct 14, 2009 | Jul 30, 2015 | Apr 27, 2010 | Jun 17, 2015 | Aug 16, 2022 | Jul 12, 2017 | Jun 21, 2013 | Aug 4, 2011 | Dec 7, 2020 | Apr 23, 2024 |
| Last Updated | Mar 21, 2026 | May 4, 2026 | Mar 31, 2026 | Aug 13, 2025 | Aug 13, 2025 | Sep 14, 2023 | Jan 14, 2026 | Oct 22, 2025 | Oct 29, 2025 | Apr 11, 2026 |
| Sentiment & Reviews |
| Sentiment | mixed | negative | negative | mixed | mixed | positive | - | - | positive | - |
| Score | 75/100 | 25/100 | 25/100 | 55/100 | 70/100 | 75/100 | - | - | 85/100 | - |
| Praises | - Long-term reliability of cycle tracking provides consistent value for users over many years
| - Long-term utility of the core cycle tracking features remains highly valued by legacy users
| - Long-term reliability of core tracking features keeps users engaged for over a decade
| - Long-term reliability of cycle tracking keeps users engaged for over a decade
| - Long-term reliability of the cycle tracking features keeps users engaged for over a decade
| - Minimalist interface design provides a distraction-free experience for tracking menstrual cycles
- Home screen widget functionality offers convenient and discreet cycle countdowns for daily users
- Privacy-focused approach to data management builds long-term trust with the user base
| - | - | - Scientific readiness scoring
| - |
| Complaints | - Inaccurate cycle predictions following recent updates cause significant frustration for long-term users
| - Aggressive monetization and intrusive advertisements disrupt the core cycle tracking experience for long-term users
| - Catastrophic data loss following recent updates prevents users from accessing historical health records
| - Data synchronization and backup failures cause significant loss of historical records
| - Widget functionality failures prevent users from viewing cycle countdowns and updates on the home screen
| - Data migration failures during device transfers cause significant frustration for long-term users
- Inaccurate cycle predictions occur when the algorithm fails to account for irregular patterns
- Widget update latency prevents real-time cycle tracking on the home screen
| - | - | | - |
| Requests | - Reset button for calendar and dashboard data to allow for fresh tracking starts
| - Simplified interface options to separate basic period tracking from fertility and pregnancy features
| - Reliable data backup and recovery mechanisms to prevent permanent loss of health history
| - Reset button for calendar and dashboard data to clear historical records
| - Reset button for calendar and dashboard data to clear historical information for new life stages
| - Expanded logging capabilities for specific symptoms and health notes during the cycle
- Integration support for automated health data syncing with platform-native health applications
- Dedicated pregnancy mode to maintain app utility during non-menstrual periods
| - | - | | - |
| Strategic Intel |
| Strengths | - Decade-long data history creates high switching costs
- Simple button-press interface reduces daily logging friction
| - Bluetooth-enabled hardware integration creates proprietary accessory ecosystem
- Community forums drive high-frequency DAU/MAU interaction loops
| - Decade-long health history creates high switching costs
- Simple, non-clinical UI differentiates from medical-grade competitors
- Pregnancy mode extends user lifecycle
| - Minimalist UI reduces cognitive load for daily logging
- Decade-long historical data creates high switching costs
- Privacy-first lock function builds deep user trust
| - Decade-plus retention driven by simple calendar-centric utility
| - Minimalist interface design reduces user cognitive load
- Privacy-first data policy builds long-term user trust
- Home screen widget integration drives daily habit formation
| - | - Multi-user tracking functions as a household-level retention mechanism
- One-time purchase model lowers the barrier to entry for price-sensitive users
| - Readiness scoring backed by 450+ scientific whitepapers
- Cross-platform wearable integration (Garmin, Oura, Strava)
| - |
| Weaknesses | - Premium tier at $9.99 exceeds category median
- 0.38 rating gap between iOS and Android platforms
| - Data-loss bugs during device transitions
- Aggressive ad-walls disrupting core logging flow
- $59.99/year premium tier above category median
| - Catastrophic data loss post-update
- Frequent launch crashes on Android
- Aggressive paywalling of legacy features
| - 0.7★ rating gap between Android and iOS
- Persistent widget synchronization failures
- Lack of robust cloud-backup for historical records
| - Widget functionality failures erode daily habit loops
- Unreliable data backup processes cause historical data loss
| - Data migration failures during device transfers
- Rigid prediction algorithm struggles with irregular cycles
- Widget update latency limits real-time utility
| - | - Pricing model limits development capital for high-velocity updates
- Manual entry requirement creates friction compared to wearable-integrated rivals
| - High daily manual logging friction
- 14-day trial conversion barrier
- Lack of social-sync features
| - |
| Pricing | freemium | subscription | freemium | freemium | freemium | freemium | free | paid | freemium | free |
| Momentum | Maintenance | Maintenance | Maintenance | Maintenance | Maintenance | Maintenance | Steady | - | Maintenance | - |
| Update Cadence | 5 versions, ~30d avg | 5 versions, 2 majors/6mo, ~17d avg | 5 versions, ~40d avg | 5 versions, ~197d avg | 5 versions, 2 majors/6mo, ~170d avg | 5 versions, 1 majors/6mo, ~405d avg | 5 versions | - | 5 versions, 1 majors/6mo, ~62d avg | - |
