PeriodOS

Track your cycle with gentle clarity. PeriodOS is a peony-pink period tracker - cycle, flow, symptoms, PMS journal, predictions. Runs entirely in your browser - no subscription, no login, no ads.

WHAT'S INCLUDED

• Today - cycle day + phase, flow level, symptom tags, mood word
• Cycle - last period, cycle length, predicted next period countdown
• Flow - daily flow log with intensity, color, cramping 1-5
• Symptoms - 10-symptom library with 30-day frequency chart
• PMS - PMS journal, triggers, self-care rituals, what-helped tags
• History - period history, cycle-length trend, predictions accuracy

100% PRIVATE AND OFFLINE

All data stays on your device. No server, no cloud, no account. Works completely offline.

WORKS ON ALL DEVICES

Open on laptop, add to home screen on iPhone (Safari) or Android (Chrome) as an app. One file, all devices.

INSTANT DOWNLOAD

Download once, use forever. No subscription, no renewal, no expiry.

PERFECT FOR

• Women tracking their period privately
• Anyone tired of ad-heavy period apps
• Menstrual health and cycle awareness
• Privacy-first cycle tracking

Questions? Message us on Etsy - we reply within 24 hours.