Exact past. Honest future.
The days you logged are facts, and we keep them exact. The days ahead are estimates — so LadyOne shows them as a window, never as a date it cannot promise.
The width comes from how much your cycles vary — not from an average of strangers.
It learns your rhythm, not an average.
Twelve cycles in, the range narrows — and it still refuses to pretend it is a date.
Your own spread
Cycle length is measured across your last twelve cycles. The more it sees, the tighter the window gets.
Patterns worth noticing
Cramps on period days, low mood before them — surfaced only when the pattern is actually there.
Cycle health, said plainly
Regular, irregular, or worth a conversation with a doctor — without alarm, and without a diagnosis.
The whole nine months, week by week.
Your due date is a window too, because that is what it really is. Follow the weeks, log how you feel, and know what is normal — and, just as clearly, what is worth a call.
Switch modes whenever life does. Nothing you already logged is lost.
Everything your doctor asks for, on one page.
Ten minutes of trying to remember, replaced by a summary you can print or send: cycle averages and ranges, recent periods, symptom days, and anything that changed.
Ranges, not averages alone
Your doctor sees the spread your cycles actually have — the same honesty the app shows you.
Your words, kept
Add a reason for the visit and it sits at the top, so the appointment starts where you need it to.
Built on your phone
The PDF is generated on the device and goes nowhere until you send it yourself.
Exporting the report is part of LadyOne Plus.
No account. No servers.
No one but you.
Everything you log is encrypted on your device, behind your passcode. We hold no copy of it, because we run nothing that could hold one. The only copies that exist are the ones you choose: your own iCloud, and anything you deliberately share.
Sync goes through your own iCloud — never ours.
On your device
Everything lives on your iPhone, encrypted behind your passcode.
Your iCloud, not ours
If you use more than one device, Apple's private sync carries it between them. We never see it.
No ads, no trackers
Nothing is sold and nothing is shared. There is no third party in the room.
Erase everything, anytime
One choice removes it all — from the app, from your iCloud, and from Apple Health.
The things people ask first.
Is my data really never uploaded?+
Really. LadyOne has no backend to upload to. Your entries are written to your device's encrypted storage, and the only copy that ever leaves your phone is the one Apple's iCloud makes for you, inside your own account.
What happens if I lose my phone?+
If iCloud sync is on, sign in on your new iPhone and your history comes back through your own Apple account. If it is off, the data was only ever on that device — which is exactly the trade privacy asks for.
How accurate are the predictions?+
As accurate as your own history allows, and never more confident than that. Under two logged cycles the app makes no prediction at all. After that it gives a window whose width matches how much your cycles actually vary.
Do I need to create an account?+
No. There is no sign-up, no email, no phone number. You open the app and it works.
Is the worship companion required?+
Never. Purity rulings, ghusl reminders, missed prayers and Ramadan planning are one optional companion you turn on — or leave off, and never see again.
Does it cost anything?+
Tracking, predictions, the calendar and the worship companion are free, with no time limit. LadyOne Plus is an optional monthly or yearly subscription that adds deeper insights, the full pregnancy journey and the doctor report export. Paying changes what you see — never where your data goes.
Is there an Android version?+
Not yet. LadyOne is an iPhone app today, built on Apple's on-device encryption and private iCloud sync. An Android version has to clear the same privacy bar before it ships.
Speaks your language
Ten languages. Two that read right to left.
Arabic and Persian are not translations bolted on — the whole interface turns around and reads the way you do.
Made with care, for you.
Free to download, and free to keep using. Nothing to sign up for, nothing to give away.
Download on the App StoreInstagram’s browser can’t open the App Store. Tap ⋯ at the top of this screen and choose Open in external browser.
Android is not here yet.