Your sigil is calculated, not decorative and not random. The same inputs always produce the same shape.
What decides how it looks
Number of spiral arcs
Your inhale and exhale lengths.
Central void (the open space in the middle)
Mostly your anchoring length, plus how long your holds were relative to the breaths.
Inner triangle
Mostly your coherence for that session.
Colour
The exercise you practised.
Starting angle
The moment the session happened.
Why two sigils can look alike
Holds do not change the number of arcs. Only the inhale and exhale do.
So 4·4·4·4 and 4·8·4·8 produce the same number of arcs, because both have a 4-second inhale and a 4-second exhale. They differ in the centre instead, because the holds are different.
Two people practising the same exercise will produce very similar sigils — same arcs, same rings. What differs is the starting angle, taken from the moment of the session, the inner triangle from coherence, and the ring colour.
This is expected. A sigil is a picture of the practice you did. Practise the same thing and you'll get a similar picture — that's the point of it being computed rather than invented.
Why my centre keeps changing
Anchoring length is the biggest influence on the central void — but only up to about three minutes. Beyond that, the centre stops widening, so a five-minute anchoring and a twenty-minute anchoring produce the same central space.
When the sigil appears
It's drawn during anchoring, at the end of a session. See Sigils and the Breath Map.
Is it random?
No. Every element comes from the session: the pattern you breathed, how long you held, how closely you followed it, the exercise's colour, and when you practised.
Nothing is generated by chance and nothing is chosen by us.
The mathematics behind it
The simple version above — arcs from your breaths, centre from your anchoring, triangle from your coherence — is what you can actually predict by looking at a sigil.
Underneath, ten systems work together to turn those numbers into a drawing:
Grant Projection Theorem — the core geometry, derived from your breathing pattern.
Force corridors — a classification your pattern falls into, which shapes the outer form.
Fine structure constant — a fixed physical constant used in the proportions.
Golden angle — sets how elements are spaced around the centre.
Hz resonance nodes — the harmonic tone you practised with.
Rosetta closure — how the outer figure completes.
Gematria mandala — paths derived from the exercise's affirmations.
Coherence triangle — the inner triangle, from your score.
Epsilon Zero gate — the central glyph form.
Session timestamp seeding — the angle everything starts from.
Two honest notes: Most exercises fall into one of a small number of force corridors, so that part varies less between sigils than the list might suggest. And knowing the ten names won't let you predict a sigil — the five inputs at the top of this article are the ones that visibly change what you see.
There's a fuller explanation on our website at https://www.spiralbreath.app/#sigmath
None of this describes anything happening in your body. It's a drawing system, and the numbers it uses are the numbers of the exercise you practised.
Colour on the free plan
A sigil permanently keeps the plan you were on when it was created.
Made on Free, it stays greyscale in the app. Made on Spiral Breath+ — or from the
Calm demo — it stays in colour, even if you later cancel.
Subscribing does not colour in older sigils. See Sigils and the Breath Map for the full rule.
Share cards are always full colour, on both plans.