Health Vault is a personal health-record app I built end to end: every lab result, medicine and doctor visit stays encrypted on one machine — graded against real clinical guidelines and explained by a local AI, never a server.
Every mainstream health-tracking app is a cloud product first — your labs, your medicines, your history sit on someone else's server the moment you use it. Health Vault flips that by design.
Nowhere. Every reading, report and note is encrypted on your own machine. There's no server to breach, sell to, or shut down.
A deterministic rules engine — not an AI guess — citing the actual clinical guideline behind every grade: ADA, AHA/ACC, US NCEP ATP III, or your own lab's printed range.
A full access log records every action taken on the vault — never the health data itself — so "private" is provable, not just promised.
Four minutes: one doctor's visit, through tests, medicines and a lab report, to a health score — every step on one machine.
Presenter is an AI avatar; the screens are the real application running on a sample profile.
Six real screens from the app, running on a sample profile.

Due-soon reminders, the six numbers that matter most, and a plain-English summary of what changed since the last reading — before you dig into anything.

Each result gets an A–D grade from a deterministic engine — "no AI, and no threshold that isn't already in the engine" — and every grade names its source: a published guideline, or the reference range your own lab printed.

A transparent 0–100 index built from a fixed 8-part panel — and, separately, the published metabolic-syndrome definition. Neither pretends to diagnose anything; both explain exactly how they got their number.

Daily adherence tracked over 7/30/90 days without punishing unanswered days, plus interaction checks against NHS/MedlinePlus sources — always framed as "worth asking your doctor," never a diagnosis.

Symptoms, conditions, doctor visits — self-reported and entirely yours to state or remove. Nothing here is inferred from a result; the app never ticks a box on your behalf.

Every action on the vault is logged — what was read, what was computed, every login attempt — with a hard rule: the log records what happened, never the health data itself.
Nothing about this is a cloud product with a privacy toggle. It's built local-first from the ground up.
Every vault unlocks with its own passphrase. There is no master key and no admin account — not even for the person who built the app.
Explanations come from a local model (llama3.2:3b) — not an API call. Nothing about a health record is sent to a third party to get a plain-English summary.
PDFs and photos of lab reports are read locally and the extraction method is shown — text-exact or OCR — alongside the result count pulled from each one.
A caregiver model with no shortcuts: one named profile can open another named profile's record, every grant is visible to the owner, and any grant can be ended individually.
Health Vault is a capability showcase — proof of how DM AI Labs builds AI-native apps that are honest about their limits and serious about privacy. If your business handles data people care about protecting, that's exactly the kind of problem worth a conversation.
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