Dottie
A cycle tracker for iPhone with no account and no cloud. Nothing you log leaves your device, so there is nothing to leak.
Coming soon to the App Store See how it works ↓
The stardust is your cycle so far. The soft band is your expected period. Under the ring, a line for the day: one of Dottie's own notes, chosen by the date, the same note all day.
Period days you logged, the window when your period may start drawn as a range, and the phases between. Tap any past or today's date to log it. Future dates are read-only.
Expected: the window when your period may start.
Cycle length, period length, the symptoms that keep company with each phase. Counts, never scores. Your patterns are calculated on this device and never uploaded.
Average cycle 31d · Full spread 4d · Typical period 5d
A date
Nov 14
Looks certain, but it's a guess with the uncertainty hidden.
What Dottie says
Period likely Nov 12–18
Based on your last 6 cycles · usually within 3 days
The soft band on the ring and the dashed days on the calendar are the same window. When cycles vary, the range widens, and Dottie says so. A late day gets calm, neutral information, never a conclusion.
Move between Today, Calendar and Insights. Open the log, tap a symptom, press Done, then look for it under Insights. Log Light, Medium or Heavy flow and watch the ring, the headline and the calendar agree. Nothing you tap is stored anywhere.
Try: Log how you feel, then Symptoms, then Cramps.
Dottie changes what it says, not who it is. Each of these is in the app today, in its own words.
Loss is held too. “I'm no longer pregnant” turns everything pregnancy related off, with a choice to resume now or pause for a while. “Take whatever time you need. Dottie will be here, exactly as you left it.”
You can change this anytime in Settings. Four palettes, and light or dark with the phone. Themes change color only, never layout. This page and the demo follow your pick.
Midnight is the discreet one: dark in both settings.
Not a promise on a page. Things you can do on the phone and watch for yourself.
Cycle day 15
Follicular
Period likely Nov 12–18
Based on your last 6 cycles · usually within 3 days
Flip it. Nothing changes, because there is no network code in Dottie to miss the network. No account, no sync, no analytics, no crash reports.
Dottie
Enter your PIN
October 2026
The same screen opens either one, at the same speed, and nothing on it says which is which. She chooses what the decoy holds when she sets it up: Believable, Blank or Custom. Wrong guesses slow down and never wipe anything.
Delete all data?
Everything on this device will be permanently deleted. Because your data isn't stored on a server, it can't be recovered.
Nothing you enter leaves this device.
There is no account and no cloud. Everything stays on this device.
Your records, the keys that lock them, your PIN and every reminder. There is no server copy, so nothing can be recovered.
A PDF of your cycle history and symptom patterns, created on this device from your own data.
It has to be readable by your doctor, so the PDF isn't encrypted. Dottie deletes its copy after you share it. Any copies you save or send are under your control.
Plus adds a cycle table, flagged patterns, a day-by-day symptom map and the health details you choose to type in at export, which are never saved.
| Last period started | Oct 14, 2026 | Cycles tracked (total) | 7 |
|---|---|---|---|
| Date range | Apr 15, 2026 to Oct 28, 2026 | Statistics based on | your last 6 completed cycles |
Based on your last 6 completed cycles.
| Average cycle | 31 days (6 cycles) | Range | 29–33 days |
|---|---|---|---|
| Variation | ±2 days | Most common | 31 days |
| Shortest | 29 days (from Apr 15, 2026) | Longest | 33 days (from Sep 11, 2026) |
| Status | Regular | Usual variation |
|---|
Based on your last 6 completed periods.
| Typical period length | 5 days | Heavy days per period (avg) | 1.5 |
|---|
No cycles flagged.
Based on your last 6 completed cycles. Each percentage counts only the cycles that reached that phase.
| Symptom | Timing | Logged in |
|---|---|---|
| Cramps | Menstrual | 6 of 6 cycles · 100% |
| Fatigue | Menstrual | 5 of 6 cycles · 83% |
| Tender breasts | Luteal | 4 of 5 cycles · 80% |
| Headache | Menstrual | 4 of 6 cycles · 67% |
Learned over the last 6 cycles. Onset is anchored where it clusters tightest (before the next period, by cycle day, or around ovulation).
| Symptom | Typical onset | Spread | How often | Duration |
|---|---|---|---|---|
| Cramps | ~cycle day 1 | ±1 day | 6 of 6 · 100% | 2 days |
| Tender breasts | ~4 days before | ±2 days | 4 of 5 · 80% | 3 days |
Estimates come from the pattern of your own logged cycles.
This summary records what was logged in Dottie; it is not a medical assessment and Dottie does not diagnose. All figures were computed on the device from 6 completed cycles. No data left the device.
Dottie started with someone very close to me.
My partner was 30 when she went into early menopause. It was a confusing time, and finding the right support wasn't easy.
We looked for an app that could help her understand and track what she was going through, but nothing felt right. Some were overwhelming, filled with features she didn't need. Others were too limited to reflect what she was experiencing.
I wanted to make something calm and simple, where she could track what was happening without feeling overwhelmed, and where her personal information stayed personal.
What started as an app for her slowly grew. I realized there might be other women, at every age and stage of life, looking for the same thing: a place to understand their own experiences without giving up their privacy.
That's why I made Dottie. It's a small project with a lot of heart behind it, and I hope it makes someone's day a little easier, the way I hoped it would for my partner.
If you have an idea, or something isn't working the way you'd like, I'd love to hear from you at hello@thedottie.app. There's no pressure to write, but your feedback helps shape what Dottie becomes.
Thank you for giving Dottie a place in your life.
— Rob
iOS 16.4 or later. No account to make, and nothing to sign in to.
Coming soon to the App Store
Nothing. There is no account, no server and no analytics. The App Store privacy label is the blank one. This website is the same: no cookies, no trackers, no third-party scripts or fonts.
Logging, the calendar with two months ahead, predictions, every safety feature, pregnancy mode, changing cycles, first cycles and the doctor visit summary are free. Your own history is free to see. Plus adds symptom timing and heads-ups, twelve months on the calendar, a fuller doctor visit summary, trying to conceive, Apple Health sync, the library and a recap after each cycle. Apple shows the price in your region, and there are no sales or countdowns.
Export an encrypted backup whenever you like, with a passphrase you choose, and keep it where you keep your own files. Restore it on a new phone from Settings or from the lock screen. If you forget the passphrase, the file is gone. There is no reset, because there is no server.
If it is in Apple Health, yes: a one-time import of menstrual flow and spotting, read on the device. Days you've already logged stay as they are. Dottie never writes to Apple Health.
No. Dottie is information only. It is not medical advice or contraception. Fertile-window estimates are for awareness only, and they stay off on hormonal methods.
Just me, Rob. Dottie is a one-person project. It's paid for by the people who choose Plus, not by advertisers, so there's nothing to sell.