Period & cycle tracker for iPhone
The cycle app that doesn’t sell you or chase you.
Predictions with a real margin of error, zero ads, no account and no data selling. One paywall prompt, ever.
The essentials are free forever. Pro is optional, with a 7-day free trial.
Day 17 · luteal phase
Period in 11 days
Expected Sep 24 – 26 · ± 1 day
Measured accuracy: 5 of 6 cycles within ±2 daysWhat you already know about the others
Four complaints we heard a thousand times. Four design decisions.
“The paywall pops up every two taps.”
Other apps interrupt you daily. WellPeriod shows you one prompt, once, and after that you only see prices if you tap a Pro feature. It’s written in the code, not in a promise.
“What used to be free is now paid.”
We commit in writing, on the purchase screen itself: the “free forever” list never moves behind Pro.
“The date is always wrong.”
An exact date is a comfortable lie. We give you a window (Sep 24 – 26) and your real accuracy, computed on your own past cycles.
“What do they do with my data?”
Nothing. There is no account and no server holding your logs. One screen shows you, word for word, what leaves your phone. No Meta SDK, no Google, no advertising.
Features
What makes it worth opening every day.
A window, not a date
“Period between the 24th and the 26th.” The margin comes from the real variation of your cycles, and it changes when your body does.
Measured accuracy
We replay every past prediction with the data available at the time and show you how many hit. Nobody shows their own error.
“What leaves your phone”
A list of third parties and every event sent, verbatim. Turn analytics off with one tap.
No account
Your logs live on your iPhone and in your private iCloud, encrypted by Apple. There is no WellPeriod server with your data.
Apple Watch, no thermometer
We use the wrist temperature your watch already measures while you sleep to confirm ovulation.
Patterns by phase
“Migraine in 80% of your luteal phases.” Symptoms, mood and energy crossed with your cycle.
4-week plan
Push, peak and rest days based on your cycle, so you train, present or slow down when it fits.
PDF report for your doctor
History, frequent symptoms and patterns on one page, ready to share at your appointment.
Truly discreet
Face ID, a neutral alternate icon and notifications that never say “period”.
Perimenopause
Palpitations, brain fog, night sweats and dryness: symptoms other apps don’t even have, with a mode of its own.
Free forever
The essentials have no price. Literally.
- Period and ovulation prediction with a window
- Calendar with 3 cycles of forecast
- Full logging: flow, mood, energy, 39 symptoms, sex, cervical mucus, temperature, pill, notes
- Period, ovulation and logging reminders
- Two-way Apple Health sync
- Daily insight and guides
- CSV export and full data deletion
- “What leaves your phone” screen
WellPeriod Pro
One clear price. No tricks.
Pro adds patterns by phase, the 4-week plan, a 12-month forecast, the PDF report, the temperature chart, full history, Face ID and the discreet icon. You’ll see prices in your currency inside the App Store.
$5.99 / month
Cancel anytime.
$34.99 / year
≈ $2.92 a month · save 50%
Free for 7 days. We remind you 2 days before it ends.
$69.99 once
No subscription. The way an app that doesn’t sell data should be.
USD prices for reference. Subscriptions are managed and cancelled from your Apple ID.
FAQ
What people ask before downloading.
Do I need an account?
No. No sign-up, no email, no password. Open the app and start. That is also why there is no server of ours holding your data.
Where is my data stored?
On your iPhone and, if iCloud is on, in your private iCloud, encrypted by Apple. We cannot read it. If you connect Apple Health, flow and temperature are also stored there, only with your permission.
What leaves my phone?
Only two things, and neither is health data: the purchase receipt (RevenueCat, to know if you are Pro) and anonymous usage events such as “opened the Insights screen” (Amplitude). Never symptoms, flow or dates. You can see it verbatim and turn it off in Settings → “What leaves your phone”.
Can I delete everything?
Yes, in Settings → Delete all data. It is removed from your iPhone and your iCloud. You can export a CSV of your full history first.
How do I cancel Pro?
From iPhone Settings → your name → Subscriptions, like any Apple subscription. Cancel the trial before it ends and nothing is charged. The lifetime purchase never renews.
Can I use it as contraception?
No. Predictions have a margin of error and do not replace a contraceptive method or medical advice. We say so clearly inside the app.
Your cycle, your data, your phone.
No ads. No account. No data selling. No chasing.