Fertility Forecaster

Your real chances of conceiving this cycle, and across the next twelve. Built from published research, honest about uncertainty, private by design. No cycle tracking.

Most fertility apps track your cycle. This one answers a different question: what are your actual chances?

Fertility Forecaster gives you a per-cycle probability of conceiving, a way to feel what that probability means, and an honest projection of how the next year or two might go.

WHAT YOU GET

A monthly number. Starting from your age, refined by anything else you choose to share — how long you've been trying, how regular your cycles are, your health, your partner. Every question is optional, and skipping one isn't a penalty.

A way to feel it. A percentage is easy to misread. Spin a wheel weighted to your exact odds. Count out a hundred people like you. Or play a year forward, cycle by cycle, and watch how differently it can go.

The longer view. Cumulative chances across the next 3, 6, 12 or 24 cycles, with the curve that shows how it flattens — and why that flattening isn't a verdict.

HOW IT'S DIFFERENT

It shows its working. A prominent "Method & medical sources" section explains the calculation and links to eight original studies and clinical guidelines.

It won't flatter you. The estimate falls the longer you've been trying, because that is what the evidence says. The app explains why that's ordinary Bayesian updating rather than bad news, and why plenty of couples in the slow tail still conceive.

It tells you where the research disagrees with the folklore. Low AMH, for instance, turns out to be a poor predictor of natural conception, and the app says so plainly instead of alarming you.

Timing is handled properly. If you use ovulation tests and concentrate sex into the fertile window, that counts in your favour — not against you for a low monthly average.

NO CYCLE TRACKING

Deliberately. There are excellent apps for logging periods and this isn't one of them. Nothing to log daily, no notifications, no streaks to keep.

PRIVATE BY DESIGN

No account, no sign-in, no network calls. Your answers live in this app's own storage and disappear when you delete it.

Fertility Forecaster gives population estimates, not a diagnosis or a prediction about you specifically. It cannot see anything a doctor would find. If you have been trying for a while, talk to one.