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.

The 4 phases of the menstrual cycle, explained

Menstruation

The cycle starts with your period. Many people feel lower energy, cramps, or a need to slow down. Tracking flow and pain can be useful.

Follicular phase and ovulation

After bleeding, energy may rise gradually. Ovulation marks a fertile window and can feel like a more social or confident phase for some people.

Luteal phase

After ovulation, the luteal phase prepares the body for a possible pregnancy. If pregnancy does not happen, hormone levels drop before the next period, which can affect mood, sleep, and energy.

Luteal shows these phases so your cycle becomes easier to read day by day.

Frequently asked questions

What are the 4 phases of the menstrual cycle?

The four phases are: menstruation (your period), the follicular phase (rising energy after bleeding), ovulation (peak fertility), and the luteal phase (second half, before your next period). Each phase involves distinct hormonal patterns that can affect energy, mood, and physical sensations.

Which phase of the menstrual cycle has the most energy?

Many people experience the most energy and mental clarity during the follicular phase and around ovulation, when estrogen levels are rising. Energy often dips during menstruation and the late luteal phase.