brainful
THE MISSING METRIC FOR WHOOP
Your body has been keeping score of your days.
Now you get to read it. brainful reads the signal your strap is already broadcasting and turns it into a score for every meeting, session, and quiet hour on your calendar. You log nothing.
Requires a Whoop 4.0 or later and an iPhone. Works alongside the Whoop app, not instead of it.
How it works
Three things, then it runs itself.
Pair your strap
brainful listens to what your Whoop already broadcasts. Nothing extra to buy, nothing extra to charge, nothing to remember.
Live your day
Every event on your calendar is scored as it happens — a b-score from 0 to 100, plus the shape of how it moved.
Read it back
Open any hour and see what it held: when it peaked, when it faded, and a short written read computed from your own data.
WHY THIS EXISTS
Your stress score is measuring your constant.
If you run a company, work a floor, or train seriously, your body is activated most of the day. That isn't a warning — it's the job.So a stress number sits high and stays high. It can't separate the day that was sharp and mattered from the day that wrung you out for nothing. Both are activation, because both are.
two days, from your strap
Twenty-nine minutes and four minutes — the same sentence, word for word. And “time outside of sleep and strain activities” is a precise way of saying we know it wasn’t a workout and we know you weren’t asleep, and that is the entirety of what we know.
Two hours, from brainful
The event, the number, and what actually happened in it. Each one arrives when that hour ends, not when the clock hits five — and you didn’t log, rate or remember a thing to get it.
Activation tells you something happened.
The b-score tells you what it bought.
brainful reads what your brain valued, and attaches it to what you were actually doing.
What you get
Your calendar, as today actually felt.
A number for every hour
Meetings, sessions, dinners, the quiet stretches in between. Each one gets its own score and its own curve — so the hours that paid for themselves stop blurring into "busy week" by Friday.
A read on what happened
A couple of sentences on each event, computed from your own data rather than written in advance. Never generic, never invented.
Notes for what the calendar missed
The hard phone call. The walk that fixed everything. Write a note around any window of time and it gets scored the same way — and it never touches your actual calendar.
THE SCIENCE UNDERNEATH
Your brain tags a moment before you feel it.
That tagging leaves a real, measurable imprint on your body. Twenty-five years of work by Dr. Paul Zak and Immersion connects those patterns to attention and emotional resonance — the same research behind tools used by broadcasters, studios and Fortune 500 teams. brainful brings that measurement to your own days, using the strap you already wear.
PRIVATE BY ARCHITECTURE, NOT BY POLICY
Nothing leaves your phone.
✅ Never stored
Your health data is scored in the moment and discarded. It is never written to disk, on your phone or anywhere else.
✅ Nothing on a server
Your scores, your calendar and your notes stay on the device. There is no backend holding your days.
✅ Three permissions
Bluetooth, calendar, notifications. No location, no health records, no account with your data sitting behind it.
Your strap has been keeping score all along.
Now you get to read it.
Requires a Whoop 4.0 or later and an iPhone. Works alongside the Whoop app, not instead of it.