Instrument your own patterns

You measure everything else. The output stays unmeasured.

Focus, energy and recall move week to week, and the movement is hard to see from inside it. Parva keeps the record, so a change becomes something you can read against your own history rather than something you argue with.

Reads how you already work · Nothing to wear · Baseline in ~2 weeks

Against your baselineLIVE
78/100
On baseline
+4 vs 30-day avg
Sharp window detected — 9:40a–12:10p. Protect it.
Focus stability82
Processing speed74
Task-switch cost61
Recall79
Trusted signal
YBacked by Y Combinator
Featured in
Business Insider
TechCrunch
Johns Hopkins
Forbes ↗

The pattern is hard to see from inside the week.

The 3pm fog. The meeting where the word didn't come. The morning the edge just wasn't there. Unmeasured, those stay anecdotes — easy to blame on coffee, impossible to compare with last month. A record closes that gap: the same days, written down, next to what else was going on.

It tracks the inputs you already obsess over — and the one output you don't.

You log sleep, HRV, glucose, training volume. None of it tells you whether your brain actually performed. Parva closes the loop with three instruments.

01 / BASELINE

Your own week, against your own earlier weeks.

Parva learns your personal baseline, then shows where this morning sits against it before your first meeting — so "I feel a bit off" becomes a comparison with your own previous weeks, with the coverage and the limits attached.

Personal baselineDaily comparison30-day trend
Focus stability · 6 weeks since baseline
+22%above your starting baseline — and holding
your baselinetoday · 78wk 1wk 6
02 / PROTOCOL LAB

A/B test yourself. Settle the arguments with data.

Does the third drink line up with a slower next morning? Does the 4pm espresso show up in the evening? Parva runs the comparison against your own record and hands you the difference, with the limits of what a personal comparison can show — so your protocol is tuned to your own evidence, not to whatever Huberman said this week.

Input → output deltasControlled comparisonOne lever at a time
A/B · cut the evening drink · illustrative example
With drinkCut
Focus
+14%
Recall
+8%
AM fog
−31%
→Observed: on this record the drink lined up with a slower morning. An association, not a proven cause.
03 / EARLY WARNING

See sustained movement off your own baseline.

A change rarely announces itself — it drifts. Parva watches for sustained movement off your own baseline and surfaces it with the context that sat alongside it, and the limits of what that context can show. And when it's time for a human, it routes you to a specialist who already has your full picture. No waiting room, no starting from zero.

Sustained movementLikely-driver attributionSpecialist routing
Focus stability · movement against baseline
Actual — flagged & correctedIf left unchecked
baselineFLAGGED · DAY 9day 1day 24
→Caught 6 days early — corrected before it would've surfaced on its own. Likely driver: a shortened sleep window.
Signals on the dashboard
Focus stabilityProcessing speedTask-switch costWorking memoryRecall latencyWriting rhythmSustained attentionCognitive variance

Built on the quantified-self logic you already live by.

Signal, not vanity metrics

Every number traces to a mechanism and a lever you control. If a reading can't change a decision, it doesn't make the dashboard.

Patterns, not content

Parva reads the rhythm of how you work, never what you write. Encrypted end-to-end, never sold, deletable in one click.

Passive by design

No tests to take, no wearable to charge, no protocol to remember. It reads the work you're already doing and stays out of the way.

“I'd been blaming the bad mornings on bad sleep for a year. Parva showed me the pattern lined up with the wine instead. Now I have a record rather than a theory.”

— Member · Founder, fintech · NYC

The skeptic's FAQ.

How does Parva measure cognition without a test?
Is this just another dashboard that changes nothing?
What exactly are you tracking — should I be worried about privacy?
Will it tell me something is wrong when nothing is?
How long until the numbers mean anything?
Does it connect to my Whoop / Oura / bloodwork?
What's included, and what does it cost?
Can I run it across all my machines?

See the pattern in your own days.

Build your own baseline, watch the trend against it, and keep the record of what else was going on — in one membership.

macOS 13 Ventura or later · Free during beta