Luteal is a private period and cycle tracking app for iPhone. It tracks your menstrual phases, mood, symptoms, and ovulation, and lets you share your cycle with a partner.

Luteal is free to download on the App Store. A premium version with additional features is available as an in-app purchase.

Yes. Luteal is built with privacy as a first principle. Your cycle data is encrypted in transit and at rest, never sold or shared with third parties, and never shown to advertisers. Partner sharing is strictly opt-in and revocable at any time.

What is the luteal phase?

The luteal phase is the second half of the menstrual cycle, occurring after ovulation and before your next period. It typically lasts 10 to 16 days and is associated with a rise in progesterone, which can affect energy, mood, sleep, and appetite.

Does Luteal work on Android?

Luteal is currently available on iOS (iPhone) only. An Android version is not yet available.

Ovulation tracking on iPhone: how to understand your fertile window

Ovulation does not always happen on day 14

Day 14 is a common example, but it assumes a very regular 28-day cycle. Stress, sleep, travel, illness, and natural hormonal variation can shift ovulation.

Tracking several cycles gives more useful context than relying on a single estimate.

What an app can do

Luteal can show an estimated fertile window, place it inside your cycle timeline, and connect it with signs you log such as mood, energy, discharge, or pain.

The goal is clarity, not a promise of perfect precision.

A contraception note

Wellness ovulation tracking should not be used alone as contraception. For contraception decisions, talk to a qualified healthcare professional.

Frequently asked questions

How do I track ovulation on my iPhone?

Download a cycle tracking app like Luteal, log the first day of each period, and the app will estimate your fertile window based on your cycle history. For more precision, combine app estimates with ovulation test strips.

Does ovulation always happen on day 14?

No. Day 14 is an average based on a 28-day cycle. Your ovulation can occur anywhere from day 11 to day 21 depending on your cycle length and natural variation.