Support Center

How do I log a period?

Open the Cycle tab and tap Edit periods at the top. Select the start day on the calendar, tap subsequent days to mark them as bleeding, and save. You can also tap Edit next to the month name for bulk edits.

Cyclz validates your entry: period duration must be 2 to 14 days, interval since the previous period ≥ 18 days, and dates accepted from 2010 onwards.

How do I correct a past period?

From the Cycle tab, tap Edit periods, navigate to the right month, tap days to add or remove from a period, and save. You can also edit any existing period by tapping its highlighted range.

How does cycle length calculation work?

Until you've logged at least two consecutive periods, Cyclz uses the profile cycle length (default 28 days). Once enough data exists, it takes the last 7 cycles and uses the median. The median is more robust than the average against atypical cycles. Full confidence is reached from 4 valid cycles.

How does ovulation prediction work?

Ovulation is estimated by subtracting your luteal phase (default 14 days, range 8-20) from the start of the next predicted period. The fertile window covers 5 days before and 1 day after ovulation (ACOG recommendation).

Both require Show fertility to be enabled in Settings. If your combined settings make ovulation fall during a period, fertility indicators are automatically hidden.

Can Cyclz be used for contraception?

No. Cyclz is not a medical device and not a contraception method. The fertile window is informational only. Consult a healthcare professional for reliable contraception.

How do I track my contraceptive pill?

Open the Pill tab and create a new pack. Choose 21/7, 24/4 or 28-day type, enter the pill name (1-30 characters) and the start date. Tap each active day to confirm intake. Pause days are automatically marked as « break ».

How do pill reminders work?

Enable the daily reminder in Settings to receive a notification at the chosen time (default 20:00). When you confirm intake, today's reminder is cancelled and the next 27 days are automatically scheduled as backup. Tapping the notification also records intake automatically.

Can I plan a future pack?

Yes, up to 12 months in advance. A future pack appears in the timeline with a special marker and becomes the current pack automatically when the start date arrives. Intake confirmation is only possible from the actual day.

How do I record an appointment?

Open the Appointments tab and tap New visit. Choose a doctor (or create one), pick date and time, and select one or more reasons (Routine, Follow-up, Illness, Vaccination, Pregnancy, Other). Add optional notes. Future appointments appear in a separate section at the top.

How do I get a reminder before an appointment?

Enable Appointment reminders in Settings and choose a delay (3 days, 1 day, 3 hours, or 1 hour before). You can have up to 5 upcoming appointment reminders scheduled.

What is the notification limit?

iOS allows a maximum of 64 scheduled local notifications per app. Cyclz schedules at any given time: up to 27 pill backups, 12 period reminders, 12 period end confirmations, 5 appointment reminders, 1 birthday and 1 end-of-pack - well within the iOS quota.

I'm not receiving notifications. What should I do?

• Check iOS Settings > Notifications > Cyclz - notifications must be allowed.
• Check that the specific reminder is enabled in Cyclz Settings.
• Make sure Do Not Disturb / Focus mode isn't silencing them.
• If you just added a pack or a period, open the app once to let it schedule the reminders.

How does iCloud sync work?

If iCloud is enabled for Cyclz, your profile, periods, packs, doctors and visits sync automatically across your Apple devices signed in with the same Apple ID. Check: iOS Settings > [Your Name] > iCloud > Apps Using iCloud > Cyclz.

How do I export my data?

Go to Settings > Import/Export and tap Export data. All your data is saved as a JSON file that you can share via AirDrop, email, iCloud Drive, or any other method.

How do I import data?

Go to Settings > Import/Export and tap Import data. Select a JSON file previously exported from Cyclz. All data is validated before application; the import replaces all existing data.

How do I delete all my data?

Go to Settings > Reset > Delete all data. A confirmation alert will appear. All profile, periods, packs, doctors and visits are permanently removed. If iCloud is enabled, data is also deleted from your iCloud.

What languages are available?

14 languages: English, Arabic, Dutch, French, German, Indonesian, Italian, Japanese, Korean, Polish, Portuguese, Russian, Spanish and Turkish. Full right-to-left (RTL) support for Arabic. Change the language in Settings > Language - it takes effect on next launch.

Does the app support dark mode?

Yes. In Settings > Appearance, choose Light, Dark, or Auto (follows the system).

Is the app free?

Yes. Cyclz is completely free with no in-app purchases. The app is supported by non-intrusive ads via Google AdMob, subject to your GDPR consent (Europe) and App Tracking Transparency choice on iOS.

Is my data private?

Yes. Your cycle, period, pill, doctor and medical data is stored locally on your device and in your personal iCloud. We do not have servers and cannot access your data. Nothing is shared with advertisers. See our Privacy Policy for full details.