P1
Liminal Ascent 1
“Ease in, don't force it.”
The circadian & ultradian rhythms app
Your day hasa biology.
ChronoPersona reads your circadian rhythm from a single wake time, then plans your day around its natural peaks and troughs. Deep work gets timed to your 90-minute focus cycles, so effort lands where your biology can actually carry it.
Free to start · No credit card · Instant, works offline. Add a free account anytime to back it up.
Your energy, mapped from one wake time
Two peaks, two troughs, four transitions
Rise
Peak
Release
Recover
One day, eight versions of you
Meet the personas your day moves through.
From the first groggy hour after waking to the evening wind-down, each window has its own biology and its own strengths. The map plans around all eight.
P2
Peak 1
“Strike while it's hot.”
P3
Liminal Descent 1
“Coast, eat, connect.”
P4
Trough 1
“Rest is the work right now.”
P5
Liminal Ascent 2
“Catch the second wind.”
P6
Peak 2
“Create, go nonlinear.”
P7
Liminal Descent 2
“Begin the descent.”
P8
Trough 2
“Power down.”
A day-architecture system
Plan on the wave. Work in the wave.
ChronoMap
See today as a living wave
Your wake time anchors eight phase windows across an energy curve. Tap any phase to see what it's good for and the sequence you've placed in it.
Flow Block
Ride the 90-minute cycle
One 90-minute wave: settle in, focus in bouts, release with a guided breath, then recover. It paces the work without turning into a timer to beat.
Protocols & Templates
Design it once, live it daily
Build reusable protocols like morning sequences, deep work, or resets, then place them into day templates that can claim their own weekdays. Monday knows it's a Gym Day.
Rhythm
Watch your chronotype emerge
Two taps a night add up to your real rhythm: your social jet lag, your sleep pressure, and where your deepest focus tends to land. It reads all of it from how you actually live, no quiz required.
The careful part
Science without the false precision.
Circadian rhythms are among the best-established findings in biology. The minute-by-minute hacks sold by productivity culture are not, and ChronoPersona keeps the two apart. It shows you the evidence, names where interpretation begins, and runs a small experiment so your own pattern can overrule the average.
How we writeNo streaks to keep
Miss a night and nothing breaks. The map reads your rhythm from whatever you log.
A schedule to test
Your plan is a starting guess. You try it against real days and adjust what doesn’t fit.
Room to rest
The afternoon trough is for recovering. When it’s time to rest, the app says so.
Pricing
Free to start. ✦ Pro for the deeper map.
The ChronoMap is free, forever. Pro lets you reshape your wave and read your rhythm back, for $4.99/mo or $39/yr.
The field guide
Learn the shape before you plan it.
Circadian rhythm8 min read
Your day has a shape
A practical, evidence-aware way to place demanding work, lighter tasks, and recovery across the natural rises and dips of a real day.
Read the guideCircadian rhythm8 min read
Your chronotype is a starting point
Chronotype runs on a continuous scale rather than two boxes: where your body clock prefers to sit on the 24-hour dial, how much of it is genetic, and how to read yours from real days.
Read the guideCircadian rhythm9 min read
Social jet lag: the timezone you never flew to
The recurring gap between your body clock and your alarm clock: how it is measured with free-day midsleep, what the health research does and does not show, and the levers that close it.
Read the guideTwo minutes to start
Set one wake time. See your whole day take shape.
Map eight phases, place your first protocol, and ride a 90-minute wave. Free, and yours wherever you sign in.