The app
Your threerhythms,read every morning.
BioCalendar works out where your physical, emotional and intellectual cycles sit today, counted from the day you were born, and pairs that with one of 512 written readings. For iPhone, iPad and Android.
- 3
- cycles, of 23, 28 and 33 days
- 512
- written daily readings
- 7
- days free, on every plan
- 5
- people on a family plan
Everything in the app, tab by tab.
Home
Your day, in one screen.
Where each cycle sits this morning, a face for its state, and the written reading for the day you are in.
Calendar
Any day, at a glance.
Every date carries its symbols. Look back at last week, or ahead to a day that matters to you.
Goals
Timing for what matters.
Name your goals and see the stretches of the next thirty days when the cycles behind each one sit above their midline.
Family
Compare days with your household.
One plan for up to five people. See, cycle by cycle, where your rhythms fall in step with someone else’s.
Ask
Ask about your week.
A companion that explains your cycles in plain language. It is there to help you think, not to predict anything.
Home
Your day, in one screen.
Where each cycle sits this morning, a face for its state, and the written reading for the day you are in.
02 · A reading
How a reading is made
Count from your birth date
Each cycle starts on the day you were born and repeats on its own period: 23, 28 or 33 days. Today is a particular day of each one.
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03 · The limit
What it is, and what it is not
Biorhythm theory is not supported by scientific studies, and BioCalendar does not claim otherwise. The readings do not predict anything, and they are not medical, financial or safety advice. People use the app as a daily prompt: a few minutes each morning to notice how the day feels against a pattern that has been counted for them. The companion and the personalised readings are written with the help of an AI service that never receives your name, email address or date of birth.
Built around one sensitive fact
Your date of birth is the only thing the app truly needs, and it never leaves our servers. Payments go through the App Store or Google Play, so we never see your card. You can delete your account, and everything in it, from Settings in one step.