Speak naturally. On-device transcription understands medication names, emotional shorthand, and neurodivergent speech patterns that standard dictation gets wrong. Or type, whatever takes less energy.

Say an entry into the Apple Watch and it lands in your journal, turned into text on the watch itself. Today's medications are on the wrist too, and each dose logs with one tap. No phone to find, nothing to unlock.

A thread is a question you are working on, like "why do my teeth hurt?" or "why do outings drain me?". File entries into it, or let Cortex suggest them, and the thread page shows everything you ever wrote about it in order.

Medications, supplements, and accommodations organized by time of day. Log doses with a tap on the phone or the Apple Watch, track what you've taken, and see your routine at a glance, no spreadsheet required.

Send text or a link into Cortex from Safari, Notes or Messages. It waits in your journal for a quick look and can go straight into a thread. Widgets on the home and lock screen open a new entry in one tap, and Siri or the Action button can start a voice entry.

Face ID or Touch ID guards the app. Everything you have written exports as plain, readable files whenever you want them. Write-ups for a doctor can be produced in English, German or Arabic.

Cortex counts what you mention most and shows it to you, with nothing invented. Browse by subject, or by what you were doing when you wrote: observing, theorising, trying something, or holding on to a good moment. Release stays out of the browse view on purpose.

A plaque on the home screen shows one good moment from your own entries, a new one every three hours. Not a quote from someone else. Something you wrote on a better day, back when you need it.

Write that you will try something, and Cortex comes back later to ask. Did you get to it? Did it work, or not, or still testing? Your tap decides what the strategy becomes. The app never guesses.

Name a period: a trip, a new medication, a bad week. The moment opens as a portrait of that time, what you took, what came up, then the entries day by day. What was life like during that, as opposed to what do I know about it, which is a thread's job.

A third write-up is made for a model, not a person: a whole thread as one dated list, up to a hundred entries, with a short preface on how to read it. Paste it into any chat model and ask your own questions.

A demo journal with seventy-two entries over several weeks lets you try threads, Mimo and the write-up before you have written a line of your own. Switch it off and it is gone, your journal untouched.

Sleep and heart rate from the Health app sit beside the day as context, if you allow it. Cortex shows them. It never draws conclusions from them.

Cortex for the Mac is coming soon, the same journal kept in step through your iCloud. Say something into the phone on the way home, and it is on the Mac when you sit down, already sorted and searchable. Write a long entry at the desk, and it is on the phone the next morning. Ask Mimo from whichever is in reach.

Raise your wrist and say what is happening. The words are turned into text on the watch itself and land in your journal a moment later. Today's medications are on the wrist too, and a dose logs with one tap. For the days when finding the phone and unlocking it is already too much.

Sync runs through your own private iCloud, tied to your Apple Account. I cannot see it, and there is no Cortex server holding your journal. What travels is your text, the sorting already done for it, threads, notes and intake logs. Voice recordings stay on the device that made them. One switch in Settings clears the iCloud copy again.