Jesse: Private Period Tracker

Jesse is a private period tracker for women who want their cycle data to stay on their own phone. It is an offline period and ovulation tracker, a PMS tracker and a cycle calendar in one simple app, with no account, no sign-up and no cloud.

PRIVATE BY DESIGN
Everything you log (period days, symptoms, mood, notes) stays in a local database on your phone. There is no account to create, no cloud sync and no server. Jesse never asks for your name, email or location, and your cycle data never leaves your device. This offline period tracker works without an internet connection, from the first screen to your hundredth logged cycle.

MENSTRUAL CYCLE TRACKER
Log period days, flow intensity, symptoms, mood, sex, basal temperature, weight and personal notes in seconds. A single tap marks "Period started" or "Period ended", with no forms to fill out unless you want the detail. Jesse is a menstrual cycle tracker that stays quick on busy days and detailed when you need it.

OVULATION CALENDAR AND FERTILE WINDOW
The on-device prediction engine learns from your own history to estimate your next period, ovulation day and fertile window, with a confidence indicator that improves the more you log. The Today screen shows your cycle day, current phase and a pregnancy-chance estimate at a glance. Whether your goal is to track your cycle, get pregnant or avoid pregnancy, the ovulation calendar is always one tap away.

PERIOD CALENDAR
A full month period calendar marks logged periods, predicted periods, fertile windows and ovulation days in distinct colors, plus a dot for every day with a log. Tap any past or present day to view or edit it. The menstrual cycle calendar makes it easy to answer "when is my next period?" before a trip or an appointment.

PMS TRACKER: SYMPTOMS AND MOOD
Track cramps, headache, bloating, backache, tender breasts, acne, fatigue, cravings, insomnia, spotting between periods and other common symptoms, plus mood tags like happy, anxious, tired or irritable. Insights show the symptoms you log most, so the PMS tracker helps you notice your own patterns over time.

REMINDERS
Gentle local reminders for an upcoming period, the first day of your period, the start of your fertile window, ovulation day, or a daily prompt to log how you feel. Reminders run entirely on your device.

CYCLE INSIGHTS
See your average cycle length, average period length, cycle regularity and prediction confidence, upcoming dates, your full cycle history, a 12-cycle length chart and your most logged symptoms, all calculated locally. A clear history of your menstrual cycle is useful when you talk to a doctor about irregular cycles.

16 LANGUAGES
Jesse is available in English, Indonesian, Arabic, Spanish, French, Dutch, Korean, Japanese, Portuguese, Hindi, German, Turkish, Russian, Vietnamese, Thai and Chinese, with full right-to-left support for Arabic.

ONE-TIME PREMIUM, NO SUBSCRIPTION
Core tracking is free forever: predictions, the period calendar and logging are never paywalled. Premium removes ads and unlocks symptom patterns by cycle phase, a detailed cycle chart, unlimited reminders, app lock with a PIN, and backup and restore. It is a single one-time purchase: pay once, keep it for life, no subscription. Free users can also watch a short optional video for 24 hours without ads.

YOUR DATA, YOUR CONTROL
Delete everything permanently from Settings in one tap, or, with Premium, export a backup file and restore it on a new phone. Nothing is stored anywhere except your own device.

Jesse is not a medical device or a contraception method. Predictions are estimates based on the information you log, not a diagnosis. Please consult a healthcare professional for medical advice, and do not rely on Jesse alone to prevent or achieve pregnancy.