Your hormones run the show. Now your body has an app that listens.

A woman's body is not a smaller, monthly-stable version of a man's.

Estrogen and progesterone shape muscle, bone, connective tissue, temperature, sleep, mood, fuel, and recovery. They rise and fall across the month, swing hard through perimenopause, and settle into a new baseline after menopause. The same workout, the same meal, the same night of sleep can land completely differently depending on where your hormones are. Most health and fitness apps were never built for this. They hand every body the same plan and leave you feeling like you failed, when the truth is the app never knew what your body was doing.

Hormone intelligence is the fix. It is the difference between an app that counts your workouts and an app that understands the body doing them.

What hormone intelligence actually means

It is a loop: read the real signals, understand what they imply for today, then act on it. Phaes runs that loop every day so you do not have to.

It reads the signals that actually tell the truth

Phaes works from what you can genuinely know, not a hormone guessed from a sensor: your logged cycle, a short daily check-in (sleep, energy, soreness, mood, and more), your symptoms, your HRT regimen, your life stage, and your bloodwork. These are the inputs that hold up, and they are the ones Phaes builds on.

It understands what those signals mean for you

Phaes anchors to your real cycle and projects your phases on demand, so a short, long, or skipped cycle never breaks the plan. It knows that a rough luteal-phase night is not a normal one, that a high follicular-phase day is there to use, and that perimenopause is defined by volatility rather than a tidy decline. The understanding is personal, built from your own logged history, not a textbook laid over a body that does not read the textbook.

It acts: training, fuel, and a daily read

The intelligence becomes something you can use. An adaptive plan for the path you pick, whether you are training for a race, getting in shape, or getting stronger, that lands hard work where you recover well and protects the days where it would cost more. Phase-aware nutrition guidance. A daily read of what your body is telling you, plus interpretive insights that surface your patterns over time.

Hormone intelligence through every stage

Your hormones are never static, and neither is Phaes. The same engine carries you through every season:

• While you cycle. Training, fueling, and recovery sync to your real cycle, with same-cycle-day history so you can see your own patterns. See cycle-based training.
• Through perimenopause. When the cycle stops being predictable, the daily check-in carries the plan, and symptom tracking helps you make sense of the volatility. See perimenopause.
• After menopause. A new baseline shifts the priorities toward bone, muscle, and recovery, and the coaching follows. See the menopause plan.
• On HRT. Log your regimen, track dose changes over time, and check in regularly on how it is going, all in one place alongside everything else your body is doing.

Everything in one place, working together

• Cycle and symptom logging with same-cycle-day history.
• A short daily check-in that drives a personal daily read.
• An adaptive plan, race training, general fitness, or strength, that responds to your hormones.
• Phase-aware and life-stage-aware nutrition guidance.
• HRT regimen tracking, dose history, and periodic check-ins.
• Bloodwork tracking with per-marker trends over time.
• Insights that interpret your patterns, not just chart them.

Phaes is iOS-first and integrates with Apple Health. Cycle tracking, symptom logging, HRT tracking, and lab tracking are free. Phaes Insights, your daily read and your trends, is $3.99 per month or $29.99 per year. Phaes Coach adds the adaptive training plan and a coach that adjusts it week to week at $9.99 per month or $69.99 per year. Your first week is free.