Lumi — Cycle Calendar

Lumi is a menstrual cycle calendar and personal diary for your iPhone. Completely free, with no account, ads, purchases or subscription. A FORECAST WITH HONEST UNCERTAINTY Cycles can vary. Lumi shows an estimated range for your next period, its confidence level and the number of cycles used in the calculation. Predictions look different from your records: a dashed outline marks an estimate, while a solid fill marks logged days. Shapes and outlines complement color. With the “Follow my cycle” goal, the calendar shows periods and forecasts. Conception days and estimated ovulation are available with “Plan a pregnancy.” Predictions do not confirm ovulation and must not be used as contraception. RECORD TODAY OR ANY PAST DAY Log flow intensity, symptoms, mood and notes. Sexual contact and insemination entries are available with every goal, from your first day using Lumi, without a cycle history or ovulation forecast. Add several separate sexual contact or insemination entries on the same day. For sexual contact, you can record whether protection was used. Each entry can have its own optional note, such as a partner name or procedure details. Edit or delete entries and undo changes. Intimacy history helps you return to a date. WEIGHT AND CYCLE HISTORY Record weight in kilograms and view its history with dates and cycle days when known. Correct or remove measurements. There are no body ratings or weight loss goals. Add past periods during setup or later in Settings > Cycle history. Edit start and end dates; leave the last day unspecified if you do not know it. The history shows how many completed cycles contribute to the estimate and why some intervals are excluded. Changes update the forecast immediately. PRIVACY AND CONTROL OF YOUR DATA Lumi makes no network requests. There is no registration, analytics, advertising or tracking SDK. Your history is stored locally under the device’s encryption. Lumi does not store health data in iCloud or send it to its own servers. Lock the app with Face ID or your iPhone passcode, hide its contents in the app switcher and choose a discreet icon. By default, the widget shows the cycle day without details. Apple Health sync through HealthKit is optional and off by default. Intimacy notes, including names, insemination entries and weight stay in Lumi and are included in your export file; they are not sent to Health. Save your history to a file to restore it on another iPhone, or export a spreadsheet for Numbers and Excel. Delete your data from Settings; only records written by Lumi are removed from Health. FOR EVERYDAY USE • Cycle length and period duration over time • Discreet local reminders • Four color themes, light and dark appearance • Dynamic Type and VoiceOver: at accessibility text sizes, the calendar becomes a list • English and Russian Lumi counts your cycle day up and says when a period has not been logged. A missing record does not trigger pregnancy prompts. Lumi does not diagnose and is not intended for contraception. Forecasts are estimates, not medical conclusions. For questions about your health, consult a clinician.