The questions we hear most often

“Lasts” counts calendar days until the day you take the last pill you have – break days in between count too, because they pass as well. Example: 54 pills with two breaks in between last 68 days. Under “Supply” in Settings you'll also see the exact date of your last pill.

Please check in your iPhone settings under Notifications → Lumi that notifications are allowed, and whether a Focus mode (e.g. “Do Not Disturb”) is currently silencing them. During your pill break Lumi stays quiet on purpose.

In the app, log it afterwards in History or mark the day as “missed” so your supply stays correct. What this means for your contraceptive protection is something Lumi can't judge – that's what the package leaflet and your doctor are for.

Go to Settings → Schedule → Switched pill … and enter your new pill and break days and the day you take the first pill of the new pack. Everything before stays in your history exactly as it was; reminders, forecast and garden use the new schedule from the switch onwards.

With travel mode on, your reminder stays at your home time – handy on short trips across time zones. To do this Lumi reads your iPhone's time zone. That isn't location tracking: no location is requested and nothing is sent anywhere.

In pill mode the withdrawal bleed is worked out from your schedule (typically from the second break day). Once you've logged your bleeding in two breaks, the window becomes your own. In cycle mode Lumi uses the median of your recent cycles, and your starting value until then. Both are estimates, not guarantees.

A plain calendar calculation from your own entries: ovulation is assumed about 14 days before your next period, the window runs from five days before to one day after. It's only available in cycle mode, has to be switched on deliberately and is not suitable for contraception. If you want to prevent pregnancy, you need a method designed for that – talk to your doctor.

No. Under Settings → Mode you switch between pill and cycle. Your entries stay.

No. Two ways, neither needs an account:

1. Backup as a file (from version 1.1): Under Settings → Backup → Create backup Lumi creates a file with everything the app knows about you. Save it to iCloud Drive or the Files app, or AirDrop it to yourself. On your new iPhone, install Lumi and tap Restore backup – done.

2. iPhone backup: If you set up your new iPhone from an iCloud or computer backup, your Lumi data comes along automatically.

The backup file isn't encrypted – keep it the way you'd keep any other private document.

In the app under Settings → Delete all data – afterwards Lumi is like freshly installed. Or simply delete the app. There's no copy anywhere else (apart from backup files you created yourself).

Nothing. Lumi needs no server and no account – the app keeps running on your iPhone for as long as iOS launches it, with all your entries. There's no service that could be switched off.

Yes, anyone who sees your iPhone sees the widget too – “Pill 10 of 21” or “Period in 3 days” shows there without unlocking. If that's too much, put the widget on the Home Screen only or leave it out. Lumi works fine without it.

Only what you choose: time range, cycles and bleeding, pain, symptoms, pill and intake. Your own notes are off by default because they often contain private things. The PDF is created on your iPhone and only goes where you send it yourself – via AirDrop, Messages, email or to a printer.

Nothing. No pro version, no subscription, no ads, no in-app purchases. That's a promise, not an introductory offer.