Tarn. vs PeriodAI

A private health journal that puts your privacy first. YOUR DATA, YOUR DEVICE Everything you log stays on your phone. No accounts. No cloud. No servers. Your health data is encrypted with a PIN only you know. SIMPLE TRACKING • Log daily entries with minimal effort • Track patterns over time • View predictions based on your history • Add notes and custom symptoms BUILT FOR PRIVACY • All data encrypted on your device • No internet connection required • No analytics or tracking • Open source - verify our claims yourself SECURE BY DESIGN • PIN protection with automatic data protection • Optional safety PIN for emergencies • Choose your app icon for discretion Whether you're tracking for health awareness, planning purposes, or personal records, Tarn gives you a simple, private way to understand your patterns without compromising your data. No subscriptions. No ads. No data collection. Just a journal that respects your privacy.

PeriodAI is a private period tracker, cycle calendar and ovulation tracker made to help you understand your body day by day. Track your period, menstrual cycle, ovulation, fertile window, PMS, symptoms, mood, weight, intimacy, birth control and pregnancy mode in one calm app. PeriodAI turns your daily logs into clear cycle insights, simple reminders and easy-to-read patterns for your next period, ovulation window and cycle phases. Use PeriodAI as your everyday menstruation calendar and wellness journal: - Period tracker and cycle calendar - Ovulation tracker and fertile window estimates - PMS, symptom and mood tracking - Cycle phases: menstrual, follicular, ovulation and luteal - Weight, intimacy and wellness logs - Birth control, pill and IUD support - Pregnancy mode - Daily Today view with quick logging - Cycle history, trends and recurring patterns - Private health journal experience - Partner sharing controls - Export, consent and account deletion controls - Premium insights for deeper cycle patterns Why PeriodAI? A cycle tracker should feel clear, private and easy to keep using. PeriodAI keeps the important details close: when your last period started, when your next period may arrive, how symptoms and mood change across your cycle, and which patterns are worth noticing over time. Privacy-first cycle tracking: Your period and health data are personal. PeriodAI is built around private health journaling, clear controls and respectful tracking, so you can log what matters without clutter. PeriodAI Premium: Unlock advanced cycle insights, unlimited history and deeper pattern tracking with a 7-day free trial. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel in Apple ID Account Settings. Questions? hello@periodai.app Privacy: https://periodai.app/privacy Terms: https://periodai.app/terms PeriodAI is not a medical device and does not diagnose, treat or prevent disease. Period predictions, ovulation estimates and fertility windows are educational estimates only. For medical concerns, contraception decisions, pregnancy questions or urgent symptoms, consult a qualified healthcare professional.