Cycle Diary vs WellPeriod

Cycle Diary is a private period tracker and menstrual calendar that lives on your phone. Log your period, follow your cycle, and see the pattern your body has been keeping all along. There is no account to create, no ads, no subscription and nothing behind a paywall. Every feature is free, in 65 languages. TRACK YOUR PERIOD Tap the days your period starts and ends and the calendar fills in around them. Cycle Diary works out your average cycle length and period length from what you actually enter, then shows the next expected period right on the home screen. Cycles that are not clockwork are perfectly normal, so if yours vary you can switch on irregular mode and see an honest date range instead of a single confident day. KNOW YOUR FERTILE WINDOW Turn on fertility predictions and the calendar marks your fertile window and your estimated ovulation day, with higher and lower chance days shaded so you can read a whole month at a glance. These are estimates based on the dates you enter. They are not medical advice and not a method of birth control. LOG MORE THAN DATES A period is not only a date range. For any day you can record flow intensity from spotting to heavy, your mood, symptoms such as cramps, headache, bloating, back pain, breast tenderness, nausea, dizziness, acne, appetite changes, fatigue and insomnia, whether you were sexually active and whether protection was used, and a note in your own words. SEE YOUR OWN PATTERN The history screen lays out every recorded cycle beside the length of the period inside it, so you can tell at a glance whether things are steady or drifting. Averages update as you log. You choose whether predictions are calculated from your recent months or from lengths you set by hand. GENTLE REMINDERS Optional notifications tell you when your period is due, when a heavier day is expected, when your fertile window opens and when your cycle is running late. You pick how many days ahead and at what time of day, and you can switch the lot off. PREGNANCY MODE Expecting? Record the start and expected end of a pregnancy and Cycle Diary pauses predictions and reminders for that stretch rather than guessing at a cycle you are not having. Your history is kept and picks up again afterwards. BUILT TO STAY PRIVATE Your entries live on your device. There is no account, we run no servers of our own, and there is nothing to sign up for. If you are signed in to iCloud your entries also sync to your own private iCloud storage, encrypted, so a new phone or a reinstall brings them straight back. We never see them. No analytics, no advertising, no tracking of any kind. LOCK IT Set a PIN, or unlock with Face ID or Touch ID. You can also hide the app's contents in the app switcher, so a glance over your shoulder shows a blank screen. YOURS TO TAKE WITH YOU Export everything to a CSV file whenever you like, and import a CSV back in. Your data is never held hostage. WHO IT IS FOR Whether you are keeping an eye on your monthly cycle, trying to conceive, watching PMS build in the days before bleeding, following an irregular or unusually long cycle, coming off hormonal birth control, or you simply want a quiet private diary of how each month felt, Cycle Diary stays out of your way. It works offline and opens straight to the calendar. NO ACCOUNT, NO ADS, NO SUBSCRIPTION Nothing is locked. No premium tier, no trial that ends, no upsell, no advertising. The whole app is free and always will be. IN 65 LANGUAGES English, Spanish, Chinese, Hindi, Arabic, French, Bengali, Portuguese, Russian, Indonesian, Urdu, German, Japanese, Vietnamese, Turkish, Korean, Thai, Italian, Dutch, Greek, Polish, Malay, Malayalam, Swedish, Hungarian, Czech, Hebrew, Catalan, Croatian, Danish, Finnish, Slovak, Norwegian, Slovenian and more. Cycle Diary is a tracking and information app. It is not a medical device and gives no medical advice, diagnosis or treatment. For health decisions, speak to a qualified healthcare professional.

WellPeriod is the period and cycle tracker that doesn't sell you and doesn't chase you. Most cycle apps show one confident date, push a paywall every few taps, quietly move free features behind a subscription, and send your data to advertisers. WellPeriod was built against each of those complaints. HONEST PREDICTIONS • Your next period is shown as a window, not a single date: "Expected Sep 24–30", with a confidence level. • Accuracy score: the app re-runs its own predictions on your past cycles and tells you how many landed within ±1 or ±2 days. No other tracker shows its own error. • Irregular cycles, PCOS and perimenopause get a wider, honest window and a "learning" state instead of a made-up date. NO ACCOUNT, NO DATA SELLING • No sign-up, no email, no password. Your logs stay on your iPhone and in your private iCloud. • No ad networks, no Meta or Google SDKs. • "What leaves your phone": a screen inside the app lists every third party it talks to and the exact anonymous events sent. Health data is never included. • Face ID lock, a discreet neutral app icon and neutral notifications (Pro). NO NAGGING • The paywall appears only when you tap a Pro feature. One automatic prompt, once, ever. • The features listed below as free stay free. That promise is printed on the paywall itself. FREE FOREVER • Period and ovulation prediction with window and confidence • Calendar with the next 3 cycles • Full daily log: flow, mood, energy, 39 symptoms, sex, cervical mucus, basal temperature, pill, notes • Reminders: period in 2 days, period today, late, fertile window, ovulation, daily log, pill • Apple Health sync both ways • Daily insight, guides, CSV export, delete everything in one tap WELLPERIOD PRO • Symptom patterns by cycle phase ("headaches show up in your luteal phase 4 out of 5 cycles") • Mood and energy by phase • 4-week planner: rest, build, push, peak and wind-down windows synced to your cycle • 12-month forecast • Temperature chart from manual BBT or Apple Watch wrist temperature, no thermometer needed • Full cycle history and PDF report for your doctor • Face ID lock, discreet icon, discreet notifications PERIMENOPAUSE, FOR REAL Palpitations, brain fog, night sweats, dryness and more, plus a dedicated goal mode with its own insights. APPLE HEALTH AND APPLE WATCH Menstrual flow and basal body temperature sync both ways with Apple Health. If you sleep with an Apple Watch, WellPeriod reads your wrist temperature to help confirm ovulation. PRICING WellPeriod Pro is optional. Monthly $5.99, yearly $34.99 (7-day free trial, then auto-renews) or a one-time lifetime purchase of $69.99. Prices may vary by country. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period; payment is charged to your Apple ID account. You can manage or cancel subscriptions in your App Store account settings. Any unused portion of a free trial is forfeited when you purchase a subscription. Privacy policy: https://wellperiod.com/privacy Terms of use: https://wellperiod.com/terms WellPeriod is not a contraceptive method and does not replace medical advice. Predictions are estimates based on the data you log.