About

About Preeo

Preeo is a cycle and period tracker for iPhone and Android, made by OTAI Technologies.

What Preeo does

Preeo predicts your next period and fertile window, and adapts to your stage of life: regular cycles, PCOS, trying to conceive, pregnancy, postpartum and perimenopause. You log flow, symptoms and moods in a few taps and see patterns you can share with your doctor. Preeo is free to download, with an optional Premium subscription.

See Preeo's features or browse the health modes.

Who makes Preeo

Preeo is developed by OTAI Technologies, an independent app developer. On the App Store, Preeo is published under the developer account “CTrackAI” with OTAI Technologies as the seller. On Google Play, the developer is listed as “OTAI Tech”.

Editorial policy for our health guides

Purpose

Our health guides help you understand your cycle and decide what to track and discuss with a clinician. They are general information, not medical advice.

Sources

We base guides on primary and authoritative sources: public-health agencies (WHO, CDC, NIH), professional bodies (ACOG, NICE) and peer-reviewed studies. Every statistic links to the source listed at the end of the guide. We don't publish statistics we can't source, and when a study was funded by a company we say so.

Medical review

Our guides have not yet been reviewed by a clinician. When a qualified reviewer checks a guide, we will show their name, credentials and the review date on that guide.

Use of AI

We use AI tools to help research and draft guides. Facts and figures are checked against the cited sources before publishing.

What we say about Preeo

Guides describe only features that are in the current app. Preeo's period, fertile-window and ovulation dates are estimates. Preeo is not a method of birth control and must not be used to prevent pregnancy.

Dates, updates and corrections

Each guide shows when it was published and last updated. We update guides when sources change. To report an error, email support@preeo.app with the subject “Guide correction”.

Important: Preeo is for wellness and information only. It is not a medical device and does not diagnose or treat any condition. Period, fertile-window and ovulation dates are estimates. Preeo is not a method of birth control and must not be used to prevent pregnancy. Always talk to your doctor about your health.