Co-Star for your hormones

The hormone tracking app that forecasts how you’ll feel today

Open Hormoscope, read one brutally accurate line, and know exactly what today will feel like — energy, mood, social battery, skin and libido, tuned to your cycle phase. Before you’re even out of bed.

See how it works

Free period calendar, forever · Pro from $29.99/yr with a 3-day free trial

Hormoscope daily hormone forecast screen showing a Day 26 luteal phase reading with live energy and mood meters
100% on-device data Face ID–locked intimacy log No account, no sign-up Weather, not diagnosis
Inside the app

Your cycle, translated into a daily forecast

Every screen answers one question: what will today actually feel like?

Daily hormone forecast in Hormoscope — a sharp one-line reading for a luteal phase day with dos and don'ts
Know how today feels
Five live hormone meters in Hormoscope — energy, mood, social battery, skin and libido scored 0 to 100 by cycle phase
Energy, mood & libido — decoded
The Briefing in Hormoscope — a week-ahead hormone weather view for planning your week around your menstrual cycle
Plan your week around your body
Period prediction calendar in Hormoscope showing phase-colored days, cycle length and period length
No more surprise periods
Symptom logging in Hormoscope — cramps, headache, bloating, fatigue, acne and cravings logged in one tap to reveal PMS patterns
Log it once, see a pattern
Privacy settings in Hormoscope — Face ID lock and on-device storage so your cycle never leaves your phone
Your cycle never leaves your phone
How it works

Two dates in. A whole forecast out.

No lab tests, no wearables, no 40-question onboarding. Hormoscope reads typical hormone patterns from where you are in your cycle.

Log your last period

Tell Hormoscope when your last period started and roughly how long your cycle runs. That’s the whole setup — the calendar and period prediction are free forever.

Get your daily reading

Every morning you get one sharp, screenshot-worthy line about your day, plus five live meters — Energy, Mood, Social Battery, Skin and Libido — tuned to your phase.

Plan around your body

The Briefing shows your week of hormone weather at a glance, so you book the big meeting on a Bloom day and guard your calendar on a Storm day.

What you get

Everything a mood ring wishes it was

A daily reading worth screenshotting

One unhinged-but-kind line about your day, grounded in where you are in your cycle. The app that seems to know you before you do.

“Looks like late luteal turns the volume up. What you feel is real, it’s just amplified right now.”

Five live meters

Energy, Mood, Social Battery, Skin & Libido — 0 to 100, every day.

Energy21
Mood31
Social43
Libido29

The Briefing

Your whole week of hormone weather at a glance — plan around your body instead of fighting it.

Period prediction & calendar

See your next period coming and exactly where you are in your cycle. Free, forever — no paywall on the basics.

Private by design

Your cycle never leaves your phone. No account. Intimacy logging locked behind Face ID and hidden from anything you share.

Guides

Cycle questions, actually answered

Practical guides to forecasting your hormones, predicting your period and planning life around your cycle.

Daily reading

The hormone horoscope app that replaced the one you lost

Hormonology's Hormone Horoscope is gone. Here's where the daily hormone reading lives now.

Read the guide
Mood forecast

The app that predicts your mood based on your cycle

Yes, it exists — five live meters that tell you how you'll feel on any cycle day, in advance.

Read the guide
Phase calculator

What cycle phase am I in right now?

Use the instant phase finder, then see what your phase means for energy, mood and social battery.

Read the guide
Period prediction

How to predict your period with an irregular cycle

Why last-period-plus-28 math fails, and how adaptive prediction learns your real pattern.

Read the guide
PMS

The app that tells you when PMS is coming

Stop getting blindsided — find your personal PMS window and see it coming a week out.

Read the guide
Cycle syncing

How to plan your week around your menstrual cycle

A phase-by-phase planner for work, social plans and rest — without keeping a spreadsheet.

Read the guide
Privacy

Period trackers that don't share your data

How to tell if a tracker is actually private — and why on-device storage changes everything.

Read the guide
Alternatives

Looking for a Stardust alternative?

Keep the daily-reading vibes, keep your data. What to switch to and why.

Read the guide
FAQ

Questions people actually search

Yes — that's exactly what Hormoscope does. Five live 0–100 meters (Energy, Mood, Social Battery, Skin and Libido) shift with your cycle phase, and a daily one-line reading tells you what today will feel like before it happens. Learn more →
Hormonology retired all of its Hormone Horoscope apps in January 2023, leaving the daily hormone reading without a home. Hormoscope picks up where it left off — a daily horoscope-style forecast driven by your cycle, with all data kept on your phone. Learn more →
Fixed calendar math (last period + 28 days) breaks the moment your cycle length varies — which is why every online calculator carries a disclaimer. Hormoscope's prediction adapts to your actual logged cycles and gets sharper every month; the period calendar is free forever. Learn more →
You can estimate it from your last period start date and average cycle length — our phase calculator does it in seconds. Hormoscope then keeps tracking your phase live and translates it into today's forecast, so you never have to recount days. Learn more →
Most trackers only log symptoms after the fact. Hormoscope's week-ahead Briefing forecasts your likely low-mood and low-energy days in advance, and your symptom logs reveal your personal PMS window — not just the textbook 1–2 week average. Learn more →
Look for apps that store cycle data on-device with no account — data that never reaches a server can't be sold or subpoenaed. Hormoscope keeps your cycle and symptom data 100% on your phone, requires no sign-up, and locks the intimacy log behind Face ID. Learn more →
If you want Stardust's fun daily-reading energy without its documented data-sharing concerns, Hormoscope is the closest match: a screenshot-worthy daily forecast powered by your hormones instead of astrology, with everything stored on-device. Learn more →
Each phase favors different things — follicular for starting projects, ovulation for big meetings and social plans, luteal for detail work and saying no. Hormoscope's Briefing turns this into an automatic week-ahead hormone-weather view built from your real dates. Learn more →
Free to start

Meet your body’s daily forecast

Period calendar free forever. The daily reading, five meters and weekly Briefing from $29.99/yr — with a 3-day free trial.