Ovum is a private period tracker that keeps your cycle on your phone. No account to create, no cloud to sync to, and no advertising. What you log stays where you logged it.

Most period tracking apps ask you to hand over the most personal record you keep. Ovum was built the other way round: there is no server to send your data to, so there is nothing to leak, sell or hand over.

TRACK YOUR CYCLE

• Log your period, flow, symptoms, mood and private notes in a few taps
• A period calendar showing every day you have recorded
• A clear today view: where you are in your menstrual cycle right now
• Cycle phases, including your estimated fertile window and ovulation day
• Period and cycle length, and how regular your cycles have been
• A PDF health report you can take to a doctor, free for everyone

PRIVACY THAT IS STRUCTURAL, NOT A PROMISE

• No account, no sign-in, no email address
• No cloud sync and no server holding your cycle data
• No analytics SDK, no crash reporting, no advertising libraries
• App Lock with a passcode or your fingerprint
• Discreet mode, which changes the app's name and icon on your home screen
• Works fully offline

Ovum's privacy policy is bundled inside the app, so you can read it on a plane, and it cannot change under you after you install.

AN APP THAT ADMITS WHAT IT DOES NOT KNOW

Most trackers show you a confident date from the first day you install them. Ovum will not. Until it has seen enough of your cycles to say something honest, it tells you so.

When it does predict, it shows you where the number came from: how many cycles it is based on, and how much your cycles vary. If you log something that contradicts the prediction, what you observed wins.

FREE, AND OVUM PLUS

Everything above is free, including the PDF health report and unlimited logging.

Ovum Plus is one payment, once. Nothing renews and there is no subscription. It adds:

• Adaptive predictions built for irregular cycles
• Trends across your whole logged history, instead of your last three cycles
• Custom symptoms, and every reminder switched on at once

IMPORTANT

Ovum is not a contraceptive and does not prevent pregnancy. It is not a medical device and does not diagnose any condition. Its predictions are estimates calculated from what you enter, and cycles vary for many reasons. Talk to a healthcare professional about anything that concerns you.