Calyx: Cycle & Hormone Sync

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About this app

Calyx is an offline-first, privacy-focused menstrual cycle and circadian rhythm companion designed to help you understand your body and optimize your daily energy.

CIRCADIAN & CYCLE SYNCHRONIZATION
Track where you are across the four natural phases of your cycle:
• Menstrual Phase: Rest, cellular renewal, and metabolic recovery
• Follicular Phase: Rising estrogen, vitality, creativity, and stamina
• Ovulatory Peak: Maximum energy, verbal communication, and confidence
• Luteal Phase: Progesterone focus, steady endurance, and mindful nutrition

DAILY BIOMARKER LOGGING
Record essential health signals in seconds:
• Flow volume and cycle dates
• Basal Body Temperature (BBT) and thermal shift tracking
• Heart Rate Variability (HRV) and nervous system recovery
• Sleep duration, rest quality, and energy fluctuations
• Mood states, symptom patterns, and physical sensations

PERSONALIZED HORMONAL GUIDANCE
Access tailored wellness protocols tailored to your current phase:
• Athletic Training: Match cardio strain and strength workouts to hormonal shifts
• Phase Nutrition: Nutrient-dense foods supporting metabolic balance
• Sleep Optimization: Circadian habits to deepen restorative rest
• Daily Vitality Tips: Evidence-informed lifestyle recommendations

SYMPTOM DETECTIVE
Identify cross-cycle trends and potential symptom triggers. Analyze multi-variable correlations between sleep deficiency, basal temperature spikes, and discomfort patterns to uncover actionable lifestyle changes.

CLINICAL REPORT & DOCTOR EXPORT
Prepare for your next OB-GYN, endocrinologist, or fertility specialist visit:
• Generate comprehensive A4 medical-grade PDF summaries
• Review biphasic temperature shifts and cycle regularity metrics
• Complete physician summary transcripts ready for clinical review

HAVEN SECURITY VAULT
Your reproductive privacy is uncompromising:
• Local-Only Storage: All health data remains strictly on your device
• Zero Cloud Tracking: No central servers, data brokers, or advertising trackers
• Biometric & PIN Protection: Secure your sensitive records with device security
• Decoy Vault Protocol: An optional secondary PIN unlocks an authentic local weather dashboard for discrete privacy under duress
• Instant Local Wipe: Erase all data permanently at any time

WELLNESS DISCLAIMER
Calyx is designed for personal health awareness, wellness tracking, and educational purposes. It is not intended as medical advice, diagnostic tool, treatment, or contraceptive method. Consult a qualified medical practitioner for healthcare decisions.
Private cycle tracking, circadian rhythm sync, and biomarker insights.
Updated on
Sep 3, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
  • No data shared with third parties
    Learn more about how developers declare sharing
  • No data collected
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Content rating
Everyone
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App support

About the developer
Phạm Đức Tuyên
xala.hub@gmail.com
Thôn 16 Hùng Thắng, Tiên Lãng, Hải Phòng Hải Phòng 12113 Vietnam

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