About

About ovuLivo

OvuLivo is a small, independent project. An ovulation calculator is the whole of what we do here: it predicts ovulation and the fertile window from the last period and cycle length and lays them onto a cycle calendar. There is no account to create, no email to hand over, and no paywall hiding behind the third advert.

Why we built this

There is no shortage of health and body-composition tools online; what is scarce is one that respects your time. OvuLivo is deliberately narrow — it predicts ovulation and the fertile window from the last period and cycle length and lays them onto a cycle calendar and stops there. A small, honest tool beats a sprawling page that buries the answer under advertising.

How the result is produced

There is no server in the loop at all. It estimates the next ovulation by counting back roughly fourteen days from the projected next period and marks the fertile window around it, which is why the answer moves when the cycle length changes, and that description is the real algorithm rather than a simplification of it, so you can repeat the sum by hand and compare the two.

Where your data goes

Your input stays local: your last period date and cycle length are handled entirely by the page and never leave your device. You can turn off your connection after loading and the tool still works, which is the simplest proof that nothing is being sent.

Who this is for

• anyone planning a diet or a training block.
• people who want a second opinion on a figure.
• readers looking for the method, not just the output.

Who pays for this

There is no charge to use OvuLivo. The costs are covered by advertising, which stays out of the way of the tool itself and has no access to your input. If an advert ever interferes with the page, tell us and we will look at it.

Tell us what you think

Spotted a mistake or missing a feature? The contact page takes it. The suggestions that get acted on usually come from people who actually use the ovulation calculator.