Cycle Syncing & Skin AnalysisSync your workouts, skincare, and nutrition with your menstrual cycle. Track your skin with AI, build phase-specific routines, and watch your glow-up unfold.
800M+
women of reproductive age worldwide
72%
report skin changes during their cycle
4 phases
each one affects your skin, energy & mood
Features
Your cycle affects everything — skin, energy, mood, metabolism. We built the app that finally connects the dots.
Know your current phase and get daily recommendations for workouts, skincare, nutrition, and productivity — all adapted to your hormones.
Snap a selfie and get an instant Visual Score. Track tone, texture, redness, spots, and pores over time with AI-powered face scanning.
See your skin transformation day by day. Compare photos side by side and create timelapses of your glow-up journey.
Phase-specific daily routines — from HIIT during follicular to gentle yoga in luteal. Your body knows the rhythm, now your app does too.
Detailed breakdowns by face zone — forehead, cheeks, nose, chin. Track 5 skin signals with clinical precision.
Build and track phase-adapted habits — skincare routines, workouts, study blocks, walks. See your streaks and progress for every routine, every day.
The 4 Phases
Each phase of your menstrual cycle brings different strengths. Sister Glow Up helps you lean into each one — not fight against it.
Days 1-5
Rest & restore. Your body is shedding — focus on gentle movement, warm foods, and deep hydration.
Days 6-13
Energy rising. Estrogen climbs, creativity peaks — your best time for new projects and intense workouts.
Days 14-16
Peak performance. You're glowing — literally. Skin is clearest, energy is highest, confidence soars.
Days 17-28
Wind down. Progesterone rises, metabolism speeds up — honor your cravings and slow the pace.
App Preview
From cycle tracking to skin analysis — every screen is crafted to feel effortless.
Home Dashboard
Glow Up
Skin Timelapse
Photo Analysis
Skin Metrics
Daily Habits
Learn
Science-backed guides and articles to help you understand exactly what's happening in your body — and use it to your advantage.
Free Guides
Science-backed PDFs to help you understand your cycle and make decisions that actually work with your body.
Download freeThe Cycle Syncing Cheat Sheet
8 pages · Free PDF
Skin × Cycle: 28-Day Skincare Calendar
12 pages · Free PDF
The Hormone-Friendly Meal Plan
20 pages · Free PDF
Comparison
Most apps stop at tracking your period. We built an entire system around your cycle.
Sister Glow UpCycle syncing
Skin analysis
Daily routines
Glow tracking
Price
Privacy
Pricing
Start free. Unlock your full glow-up when you're ready.
Your photos and cycle data never leave your device. Local-first architecture with full control.
Designed with real women's health science. Every recommendation is evidence-based and cycle-aware.
Advanced skin scoring with face zone breakdowns. Real insights, not generic advice.
Questions & Answers
Answers to the most common questions about cycle syncing, AI skin analysis, and how Sister Glow Up works.
Sister Glow Up is a cycle syncing app for iOS that combines menstrual cycle tracking with AI skin analysis and phase-specific lifestyle recommendations. Unlike basic period trackers, it adapts your skincare routine, workouts, and nutrition to each phase of your cycle — follicular, ovulatory, luteal, and menstrual — for optimal results.
Cycle syncing is the practice of adapting your lifestyle — exercise, nutrition, skincare, and self-care — to the four phases of your menstrual cycle. Research shows that hormonal fluctuations affect skin, energy, metabolism, and mood throughout the cycle. Sister Glow Up makes cycle syncing practical by providing daily phase-specific recommendations.
Yes. Sister Glow Up uses AI-powered skin analysis that scans your face through selfies and provides a skin score with detailed breakdowns by face zone. It tracks skin health over time and correlates changes with your menstrual cycle phases, helping identify patterns like hormonal acne during the luteal phase.
While Flo and Clue are excellent period trackers, Sister Glow Up goes beyond cycle tracking by integrating AI skin analysis, phase-specific skincare routines, cycle-synced workouts, and nutrition guidance. It's designed for women who want to optimize their entire wellness routine around their cycle, not just track periods.
Yes. The app tracks your skin health alongside your menstrual cycle, identifying patterns in breakouts related to hormonal changes. It provides phase-specific skincare recommendations to help prevent and manage hormonal acne — for example, suggesting gentler products during the luteal phase when skin is more sensitive and breakout-prone.
Sister Glow Up offers a free tier with cycle tracking, basic phase guides, and limited skin analysis. The premium plan unlocks unlimited AI skin scans, detailed skin score history, personalized skincare recommendations, cycle-synced workout plans, and nutrition guidance.
Join thousands of women who are living in sync with their cycles — and seeing real results.
