We showed you how it's built. Here's what it feels like.
Meet MIST — a health agent that knows your data and the evidence, and is honest about both. Follow one real day, and one real experiment, as I dogfood it on myself.
It doesn't hand me advice. It designs a test.
Before anything happens, MIST proposes a real two-week n=1 trial: a clear hypothesis, what we'll measure, what we hold constant, and the success criteria — set before we start, so I can't move the goalposts later.
- Who
- Me — the founder, dogfooding MIST on myself.
- State
- Curious but skeptical: "do naps even work for me?"
- Doing
- Reading MIST's proposed 2-week trial before I commit.
- The point
- Lock the success bar now, so I can't fudge it later.
- Hypothesis
- A 25-min early-afternoon nap improves next-morning recovery.
- Readout
- HRV-based recovery (objective) + how I feel (subjective 1–5)
- Held constant
- Caffeine cutoff 12:00 · protein target each day · no other new variables
- Success criteria
- ≥ 10% recovery lift on nap days, holding across ≥ 8 of 14 days — decided now, not after
"Naps are great for you! 😴 Tap to log your nap and keep your streak going."
"Here's a test that could actually tell you — for you. Two weeks. Here's exactly how we'll know if it's real."
It doesn't give you advice. It helps you find out.
It reads the night honestly — then asks how I actually feel.
The wearable gives the objective layer. But the number isn't the whole story, so MIST asks for the subjective one and fuses both into today's plan.
- Slept
- 6h41 · HRV 48ms · resting HR 54 — a notch below baseline.
- Feeling
- 3/5. Wired, slept badly.
- Ahead
- A 2pm review I'm dreading.
- Doing
- Telling MIST the human half it can't read off a wrist.
MIST never pretends a good HRV means a good day, or a bad one means I'm broken. It holds both: the signal and the self-report. And it knows where its job ends.
An outlet — not a therapist. MIST listens and supports, and it will never diagnose you or play clinician. We drew that line on purpose.
Two kinds of data, one honest read. It fuses the wearable and the human.
It acts in the world. It never acts behind my back.
Today the nap is the intervention being tested, so MIST defends it — and keeps nutrition controlled so it can't skew the readout. But every real-world action is a proposal I approve, never a unilateral move.
- Situation
- A clean 25-min nap window — but it collides with a sync.
- The move
- I approve shifting the sync to 3:15; lunch is the 45g-protein bowl.
- Why
- The nap is the intervention; constant nutrition keeps it clean.
- Rule
- Nothing happens until I say yes.
It acts in the world — but you're always in the loop.
Two weeks later, it tells me the truth — including what it doesn't know.
- Data
- 14 days, nap days vs non-nap recovery.
- Result
- ~8% better on nap days — but noisy, weekends confounded.
- Verdict
- Plausible, not proven (moderate confidence).
- Next
- MIST offers experiment v2 to tighten it.
Real numbers, honestly drawn. The bars differ, but the error ranges overlap — exactly why MIST says "plausible," not "proven."
"Honest uncertainty is the product."We win the same way the architecture does — by showing the work, not by sounding certain. A clean fake win would have been easy. This is better.
The result doesn't end the story. It seeds the next one.
What we learned updates my personal protocol → which sets tomorrow's smarter defaults → which generates fresh data → which seeds the next experiment. That loop, grounded in your own data and a pluralistic evidence base, is the whole thing.
- Updated
- My protocol nudges toward an early-afternoon nap.
- Tomorrow
- Smarter defaults — still proposed, still approved.
- Seeds
- Experiment v2: control weekends, run 4 weeks.
- The idea
- Learn → Act → Data → Learn, tuned to me.
Learn — run the experiment
A rigorous n=1 trial with honest success criteria.
↳ today: the 2-week nap test & its readoutAct — execute the day
Smarter defaults, proposed and approved, that respect the protocol.
↳ today: protected the nap, controlled nutritionData — fresh signal
Every action you take becomes the input for the next question.
↳ today: HRV + self-report feeding v2Most apps tell you what to do. MIST helps you find out what's true for you — and never pretends to be more sure than it is.