Lunar calendar, lunar cycle, Fibonacci sequence: 28 Signal combines these three systems to reduce your mental load and give you a precise wellness signal every morning. Free on Android.

-- You push yourself. Every day. Without knowing why.

You've tried to-do lists, productivity methods, meditation apps. You've optimized your sleep, your mornings, your routines.

And yet. Some days, everything flows. Other days, nothing happens—and you don't know why.

It's not a lack of discipline. It's a disconnect from your natural rhythm.

Modern time has disconnected us from life. We chase after an artificial calendar—Gregorian, linear, indifferent to our energy—forgetting that our bodies obey the same geometric cycles as nature.

28 Signal reconnects you to this cycle. Not with vague affirmations. With a signal.

--- The Method: Fibonacci + Lunar Cycle

In 1202, Leonardo Fibonacci described the mathematical sequence that structures the growth of all living things: 0, 1, 2, 3, 5, 8, 13, 21.

It is found everywhere in nature. 28 Signal translates it into key days of the lunar cycle.

These days carry a graduated signal from P0 (Operational Mode) to P5 (Apogee). Fibonacci days are the days when action makes sense. The others? A background rhythm—without pressure, without overload.

The 28 Signal lunar calendar is based on actual astronomical ephemerides. Not an approximation. Not a symbol. The exact position of the Moon, every morning.

The lunar year has 13 months. It begins with the second new moon after the December solstice—just as civilizations that read the sky did before inventing the calendar.

--- Your Vitruvian Number: The Signal Becomes Personal

Three centuries after Fibonacci, Leonardo da Vinci inscribed the human body within the circle and the square—the Vitruvian Man. Proof that we obey the same geometric proportions as nature.

28 Signal uses this canon to calculate your Vitruvian Number: a number between 4 and 12, derived from your date of birth.

This number reveals the precise day of the lunar cycle when energy converges on you. On that day, the signal is no longer general. It becomes personal. It is your Vitruvian day—the day when everything aligns, if you know how to recognize it.

--- Features

✦ Complete lunar calendar (13 months, actual astronomical ephemerides) ✦ Exact position in the cycle each morning (Month: Day) → Signal of the day: verb + power (P0 to P5) → Calculation of your personal Vitruvian Number
✦ Day off identified in the cycle
✦ Clear, uncluttered interface
✦ Available on Android, iOS, and web

Your signal awaits you tomorrow morning.

Download 28 Signal for free - no map required.