--- title: "YIMA: Period Tracking - Reviews, Revenue and Downloads in United States | Apple App Store" description: "YIMA: Period Calendar is a beautifully designed, privacy-first menstrual cycle tracker built with love by the Novawerk open-source community. YOUR PRIVACY MATTERS All data is stored locally on your d" --- # YIMA: Period Tracking — United States > Period Calendar ![YIMA App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple221/v4/5f/a6/78/5fa6786d-a21b-7696-29d5-06afc4634e2b/AppIcon-1x_U007ephone-0-1-85-220-0.png/434x0w.png) **Developer:** [Haodong Ju](https://apptail.io/developer/haodong-ju-DfHLjc) **Category:** Health Fitness **Rating:** N/A (0 ratings) **Price:** Free **Bundle ID:** com.novawerk.yimalaile **Store:** Apple App Store **Country:** United States **Version:** 1.5.7 (released 2026-05-18) **Original Release:** 2026-04-09 **Languages:** English, Chinese **App Store Link:** [Download on Apple App Store](https://apps.apple.com/us/app/app/id6761681327) **AppTail Page:** [https://apptail.io/app/yima-period-tracking-hXjA/united-states](https://apptail.io/app/yima-period-tracking-hXjA/united-states) ## YIMA Description YIMA: Period Calendar is a beautifully designed, privacy-first menstrual cycle tracker built with love by the Novawerk open-source community. YOUR PRIVACY MATTERS All data is stored locally on your device. No accounts, no cloud sync, no tracking, no ads — ever. You own your data completely. SMART PREDICTIONS Record just 2-3 cycles and YIMA automatically predicts your upcoming periods, fertile windows, and cycle phases with increasing accuracy. CYCLE AT A GLANCE • Visual calendar with color-coded period days and predictions • Real-time cycle phase indicator (Menstrual, Follicular, Ovulation, Luteal) • Countdown to your next period with day-by-day tracking • Bar chart showing cycle length trends with outlier detection DAILY LOGGING • Track flow intensity (Light, Medium, Heavy) • Record your mood and symptoms • Add personal notes for each day • Backfill past periods anytime DETAILED STATISTICS • Average period and cycle length over last 6 cycles • Visual cycle comparison chart • Complete history with period and cycle data • Easily spot irregularities THOUGHTFUL DESIGN • Material Design 3 with expressive shapes and animations • Light and dark mode support • Smooth page transitions and delightful interactions • Available in English and Chinese (中文) OPEN SOURCE YIMA is built by Novawerk — open-source apps, made with care. View our code, contribute, or verify our privacy claims at github.com/Novawerk/yimalaile. This app does not provide medical advice. It is for educational and planning purposes only. ## YIMA Screenshots - [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/00/d9/5c/00d95cc5-3d68-e460-bff2-8669cf968e57/01-overview.png/1320x2868.png) - [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/78/ff/b8/78ffb8f9-f42e-669d-5806-dd2a35e40a76/03-statistics.png/1320x2868.png) - [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/9f/fb/cc/9ffbcc00-b9fa-2387-b4bd-929ce82f911d/05-settings.png/1320x2868.png) - [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/0f/61/09/0f610947-9e34-d125-7d52-ef4ac90e738d/02-detail.png/1320x2868.png) - [Screenshot 5](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/94/a2/44/94a24484-ef91-ad4a-8fd2-aa070181bfcd/04-reminder.png/1320x2868.png) ## Apps Similar to YIMA - [MyTowerHealth](https://apptail.io/app/mytowerhealth-UQKb/united-states) - [Fit Mom - Postnatal Workouts](https://apptail.io/app/fit-mom-postnatal-workouts-CqNj/united-states) - [Argazar](https://apptail.io/app/argazar-VxGn/united-states) - [haua](https://apptail.io/app/haua-SZwp/united-states) - [OmaPirha Digiklinikka](https://apptail.io/app/omapirha-digiklinikka-jFRp/united-states) - [Period Tracker Apps for Women](https://apptail.io/app/period-tracker-apps-for-women-GFdv/united-states) - [Period Calendar Cycle Tracker](https://apptail.io/app/period-calendar-cycle-tracker-Wdex/united-states) - [Vyla – Gut & IBS Tracker](https://apptail.io/app/vyla-gut-ibs-tracker-gJpy/united-states) - [Folliq – PCOS Weight Loss](https://apptail.io/app/folliq-pcos-weight-loss-vbEz/united-states) - [Fasted Harmony: Cycle Syncing](https://apptail.io/app/fasted-harmony-cycle-syncing-CAWz/united-states) ## YIMA Available In - [Canada](https://apptail.io/app/yima-period-tracking-hXjA/canada) - [Switzerland](https://apptail.io/app/yima-period-tracking-hXjA/switzerland) - [China](https://apptail.io/app/yima-period-tracking-hXjA/china) - [Czechia](https://apptail.io/app/yima-period-tracking-hXjA/czechia) - [Spain](https://apptail.io/app/yima-period-tracking-hXjA/spain) - [United Kingdom](https://apptail.io/app/yima-period-tracking-hXjA/united-kingdom) - [Hong Kong SAR China](https://apptail.io/app/yima-period-tracking-hXjA/hong-kong) - [Thailand](https://apptail.io/app/yima-period-tracking-hXjA/thailand) - [United States](https://apptail.io/app/yima-period-tracking-hXjA/united-states) --- ## About AppTail [AppTail](https://apptail.io) is a mobile app intelligence platform providing app analytics, ASO (App Store Optimization) tools, keyword tracking, competitor analysis, revenue estimates, and review monitoring for iOS App Store apps. Track your app's performance, discover ranking keywords, monitor competitors, and analyze market trends. - [Search Apps](https://apptail.io) - [Top Charts](https://apptail.io/top-iphone-apps) - [Sign Up for Full Access](https://app.apptail.io/signup?utm_campaign=ai-crawl&utm_content=footer) *Data provided by [AppTail](https://apptail.io) - Mobile App Intelligence Platform*