The brief

Longvai is a personal health data platform. It is a product of INNOVA CONSULT LTD., the Ottawa company of our business group, and Marketing MIX builds and promotes it. The footer of longvai.com carries our "Development & promotion" credit.

The user it is built for already wears a ring or a watch, has a folder of lab results and maybe a habit journal. Each source has its own app and its own charts, and none of them answers the question the user actually has: which of my habits goes together with which of my numbers. The brief was a layer on top of the data a person already has. It should collect that data in one place, find patterns with honest statistics, let the user test a habit on themselves, and say all of it in plain words, without crossing into medical advice.

What we built

Getting data in

Work started on 25 April 2026. Data comes in three ways: an Android companion app that writes from Health Connect, file import of CSV and ZIP exports in a dozen auto-detected shapes, and provider connectors. Repeated uploads and retried syncs are de-duplicated, so the same night of sleep is never counted twice. A 30-second daily check-in adds what no device measures.

Six connected modules

The product is organised as six modules that feed each other: Care Chat, where the user asks about their own data; Predictive Intelligence, with forecasts of personal metrics; an Experiment Tracker for n=1 trials, where a person compares their own numbers with and without a habit; a Weekly Review written every Sunday; Anomaly Detection, which flags a metric that leaves the user's own usual range; and Goals & Progress. The features page adds biological age, habit impact, a correlation explorer, cycle tracking, workouts, medications and supplements, and data export.

Numbers from rules, words from the model

Every engine is deterministic and produces a full result without any language model. Correlations use Spearman rank correlation with Benjamini–Hochberg correction, and collinear factors are collapsed so one habit is not counted twice. A language model only writes the text on top: the chat answers, the written insights and the weekly review. Because the numbers never depend on the model, the whole test suite runs offline.

The backend is a Python FastAPI service with its own database; the web app is built on Next.js 16. Public pages are served as static files, which keeps the site fast and the marketing pages independent of the app.

Plain statements on safety and privacy

The FAQ answers the questions people ask before handing over health data. The site describes Longvai as an analytics and education tool that does not diagnose or treat any condition. The privacy policy names the legal entity, says where the data is stored, lists what the product never does (sell data, show ads, track users across the web) and states that data can be exported or deleted at any time.

Where it stands today

On 8 November 2026 longvai.com is live in English, in open beta, with sign-in through Google or e-mail and no card. The menu holds Home, Features, How it works, Science, Pricing, Compare, Blog, Guides and About. The footer reads "a product of INNOVA CONSULT LTD., Ottawa, Canada". The sitemap lists 139 addresses, 118 of them in the guides library.

Related

The site: corporate websites. Search: SEO. Another product of our group: Finman.

Project lead: Marketing MIX. Product: Longvai, a health data platform of our business group. Year: 2026.