Speak
Without editing yourself.
Audio and transcription stay on this iPhone. Only the transcript is included if you talk to Coach.
Signals, held quietly
Your body has beenkeeping notes.
Write what’s moving through you. Cyon sets your words beside your sleep, heart, and activity — and waits until they agree. No scores. No diagnosis.
Check in your way
Start with the day you actually had.
That is the whole ask. Cyon starts with your words, not your wrist — the body turns up later, to agree or disagree.
Write
A page already opened on your day.
Never a blank box and a blinking cursor. Start wherever you are.
Name the state
Where are you landing?
Heavy, Low, Even, Light, Bright — and stress only if you want to say. Some evenings you have a sentence; some you have a shrug.
Words → body → evidence
First, Cyon reads the day back.
Cyon names what an entry was about, on your phone, using the model built into iOS. The themes never leave it.
“Nothing it could put a name to yet — which is a perfectly normal answer.”
What Cyon shows when a day gives it nothing. It would rather say that than invent a theme.
Four signals
The body corroborates.
Four signals, each against your own usual range — not a population's. A hue names which signal you are looking at, never how you are doing. Sleep is plum whether you slept nine hours or four.
- Sleep
- How long, and how broken.
- HRV
- How much slack your nervous system has.
- Resting heart rate
- What your heart does at rest.
- Activity
- What you asked your body for.
One thread of days
A very high bar.
Your words and your body sit on the same spine, one bead per day. A day Cyon can read is a morning, the words you wrote that evening, and the morning after — it needs all three before one can say anything about the other.
Today
Distance from the centre carries the state. Colour only tells you which signal you are looking at.
Lately
When it stays quiet
Quiet until there is something worth saying.
Cyon would rather miss a weak pattern than manufacture a confident-sounding one. It compares you to you, it waits for the evidence to hold, and when it has nothing, it says nothing.
“That's a pattern, not a cause — just what stood out when Cyon read your words next to the days that followed.”
It starts looking at six readable days and stays quiet until twenty. Before that it says so plainly — it crosses zero, so Cyon can't tell yet — and even after, only that it has seen this once and is waiting to see it again.
Cyon marks this screen example — not your data, and so do we. Yours will say what it actually found.
Trust, precisely
Your health record lives on your phone.
You pick every signal Cyon may read, and can turn any of them off later. Your words are read on your phone.
Never leaves this phone
- The themes Cyon names from your words
- The statistics it builds from them
- Raw, throughout-the-day heart rate
- Your physical load score
- Voice recordings and their transcription
- Workout details
Goes, only when you open Coach
- Daily sleep, HRV, resting heart rate, activity
- The check-ins you wrote or spoke, word for word
Never stored. Never used to train anything.
Read the exact wording, as the app states it
Your words are read on your phone — the themes and the statistics Cyon builds from them never leave it. Throughout-the-day heart-rate readings stay in Apple Health; Cyon keeps only a temporary working set on this device. The physical load score, voice recordings, their on-device transcription, and workout details stay here too.
When you choose to talk something through, that turn goes to the model: your daily sleep, HRV, resting heart rate, and activity signals, and the check-ins you wrote or spoke, word for word. Raw heart rate, the physical load score, workout details, and voice audio are never sent. It's never stored and never used to train anything.
If things get heavy
Some nights need a person, not an app.
Cyon checks what you write on your phone, before anything is sent anywhere — so it still works with no signal. When it finds something, the crisis card answers, not the model.
Cyon isn't an emergency service. If you're in immediate danger, call 911.
Questions
The useful details.
What the beta asks of you, what it keeps, and what happens next.
What does it cost?
Nothing during the beta. If Cyon ever costs money, you will know before it does — and everything you have recorded exports as JSON whenever you want it, so nothing is held hostage.
Do I need an Apple Watch?
No. Writing alone gives Cyon a day it can read. A wearable adds sleep, HRV and resting heart rate as corroboration — Cyon reads Apple Health, Google Health (Fitbit, Pixel Watch) and WHOOP.
How long before it notices anything?
Longer than you would like. A day Cyon can read is a morning, the words you wrote that evening, and the morning after — and it needs all three, many times over, before it will say one followed the other. It stays quiet until then, and that is the point.
What actually leaves my phone?
When you choose to talk something through, that turn goes to the model: your daily sleep, HRV, resting heart rate, and activity signals, and the check-ins you wrote or spoke, word for word. Raw heart rate, the physical load score, workout details, and voice audio are never sent. It's never stored and never used to train anything.
Can I delete everything?
Yes — a single date range or all of it, from Privacy & data. Deletion is permanent and takes effect right away. No copies are kept.
Is there an Android version?
No, and not soon. Cyon reads Apple Health directly and names your themes on the on-device model in iOS.
Why 18+?
Cyon asks about mood and stress and keeps a written record of both. It has not been designed or reviewed for anyone under 18.
What happens when the beta ends?
Your record is on your phone, not on a server, so it does not evaporate when a build expires. You will get notice before the beta closes, and an export before you need one.
Your body already started. Meet it there.
Free during the beta · iPhone, iOS 26 · Opens Apple's TestFlight · You pick every signal, and can delete everything at any time