Help & support

It starts from the cycle and period length you enter during setup. As you log period starts, it learns your own average, ignores gaps that look like a forgotten log, and shows a likely range (for example ±2 days). If your cycles vary a lot, it says so and widens the range.

No. Predictions are estimates from your past cycles, not measurements, and ovulation can shift from month to month. Don't rely on Luba to prevent or plan a pregnancy.

Luba shows how many days late it is and moves the prediction forward each day until you log it. Stress, travel and illness can delay a period; if you could be pregnant, a test can tell you.

Turn on "My cycles are irregular" in Settings → Cycle settings. Luba then shows wider ranges. With hormonal contraception, PCOS or perimenopause, day-by-day phases matter less: use Meals → Target a symptom, which recommends food by what you're feeling instead of by cycle day.

Luba has 592 recipes from 27 food traditions. Calories and macros are calculated from each recipe's ingredient amounts using USDA FoodData Central. Each phase and symptom suggestion shows how strong the evidence behind it is.

Yes. In Settings → Traditions & diet you can choose a diet (such as vegetarian or no red meat), allergens to avoid and health conditions. Dishes that aren't safe for a condition you select are hidden, and safety notes for foods that need careful preparation are always shown.

In Meals → Fridge, add the ingredients you have. Luba shows dishes you can make now, and ones missing one or two things, best for your current phase first. You can add missing ingredients to your grocery list.

Yes. Your data is kept on your iPhone and saved to your Luba account so it syncs between your devices. Only you can see it, it's never sold or shared, and there are no ads or tracking. See the privacy policy.

Your account keeps your cycle history safe if you lose or change your phone, keeps it in sync on your devices, and will let you share parts of it with a partner. Luba uses Sign in with Apple, so there's no password to create, and you can hide your email from Luba when Apple asks.

Settings → Account → Delete account. It permanently erases your account and all its data, on our servers and on your iPhone, and revokes Luba's access to your Apple ID. Save a backup first (Settings → Your data) if you want to keep a copy.

Install Luba on the new phone and sign in with the same Apple ID: your data comes back automatically.

Settings → Reset and set up again erases your cycle history, logs and meals from your iPhone and your account, and keeps you signed in. To remove the account itself, use Settings → Account → Delete account.

Settings → Your data → Doctor report creates a one-page summary of your cycle lengths, periods, flow and symptoms that you can print or save as a PDF.

In Settings → Apple Health, tap Connect and choose what to allow. Periods, flow and symptoms sync both ways: what you logged in Apple's Cycle Tracking or other apps comes into Luba, and what you log in Luba goes to Health. Luba also reads basal body temperature and Apple Watch wrist temperature to confirm when you ovulated.

After ovulation, body temperature rises slightly and stays up until your next period. When your temperature has been higher than the previous six days for three days in a row, Luba marks the day before the rise as your confirmed ovulation on the calendar and in Insights. It needs about a week of readings in a cycle, for example from an Apple Watch Series 8 or later worn to sleep. It's an estimate, not a fertility test.

Check what Luba is allowed to read in the Health app → your profile → Apps → Luba, then tap Sync now in Luba's Settings → Apple Health. If a period in Health is within two weeks of one you already logged in Luba, Luba keeps yours.

• Check the reminder is on in the app (tap the bell).
• Make sure notifications are allowed: iPhone Settings → Apps → Luba → Notifications.
• Open Luba once in a while: reminders are refreshed each time you open the app, so predictions stay current.

Yes. Turn on "Discreet notifications" in Reminders, and your lock screen will only show "Luba: You have a reminder."