Calendar
Physical (23 days), emotional (28) and intellectual (33) — a percentage for any day.
Zero-crossing days are marked on the grid — by the theory, days of heightened sensitivity.
In PRO — three curves a month ahead to see the highs and lows.
In PRO — a list of people (family, friends, up to 20): each with their own percentages and average compatibility with you. Shown to free users as a teaser so the feature is discoverable.
In PRO — a heads-up before a critical day: “take extra care”.
Set once in your profile — a single source across all devices (editable on web and in the app).
Free
- Daily values for three cycles (physical 23 / emotional 28 / intellectual 33)
- Critical days on the grid
- A clear explainer + birth-date entry
In PRO
- Monthly chart (three curves, SVG)
- Compatibility — a list of up to 20 people
- Critical-day reminders
FAQ
Is it scientific?
The biorhythm theory isn’t scientifically proven — in the app it’s an entertaining, motivational “self-observation” layer and is labeled as such.
What do I need to enter?
Just your birth date (once, in your profile). Everything else is computed offline.
What is compatibility?
A comparison of your cycles with those of people close to you by birth date — an average match in percent, up to 20 people in the list (PRO).
How is this different from “Cycle”?
Biorhythms is an entertainment layer based on your birth date (not scientifically proven). “Cycle” is real biology from your own logs. They’re different things.
How much is it?
Daily values and critical days are free. The monthly chart, compatibility and reminders are in PRO.