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THI / THE HUMAN INDEX

A private signal for the human behind the routine.

THI is Arzenal’s local personal-trend indicator. The deterministic tHiX™ algorithm combines recent, authorized signals only when enough evidence exists.

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INDEX + ALGORITHM

THI is the view. tHiX™ is the local calculation.

The Human Index is a 0–100 personal trend indicator built into Arzenal. Version tHiX-1.2.0 is deterministic: the same eligible inputs, time, and time zone produce the same result without AI or a network call.

A missing score means unavailable, not zero. The algorithm waits until at least two independent dimensions and sufficient weighted coverage are present.

EXPLAINABLE BY DESIGN

Four dimensions, each with its own evidence.

Recovery30%

Recent authorized sleep signals, with eligible manual sleep as fallback.

Movement25%

Authorized step and exercise-minute summaries from Health Connect.

Mental Readiness25%

Focus, energy, mood, completed focus sessions, and bounded caffeine context.

Routine Engagement20%

Consistency across due, completed, and skipped routine actions.

SEVEN-DAY WINDOW

Freshness before scoring.

tHiX™ validates local inputs, integrates recent history with a 3.5-day half-life, and applies a bounded momentum adjustment before composing the index.

  1. 01

    Authorize

    The user chooses which local records and Health Connect permissions Arzenal may use.

  2. 02

    Validate

    tHiX™ checks permission, freshness, valid ranges, and the exact seven-day observation window.

  3. 03

    Normalize

    Eligible signals are transformed into comparable 0–100 values with product-specific bounded curves.

  4. 04

    Integrate

    Four dimensions use recency-weighted history, coverage, confidence, and bounded momentum.

  5. 05

    Return

    THI emits a score when evidence is sufficient, plus status, confidence, coverage, missing signals, and algorithm version.

MORE THAN A NUMBER

Score, confidence, coverage, and context.

Status

Unavailable, Emerging, or Established

Confidence

How strongly the available evidence supports the result

Coverage

How much of the configured signal surface is represented

Version

Stored with every optional history row to prevent false trend comparisons

LOCAL-FIRST BY CONTRACT

The calculation stays with the user.

The implemented tHiX™ calculation makes no network call and uses no AI. The result is not uploaded. Optional one-row-per-day history is local, default-off, versioned, and independently deletable.

On-device calculationNo AINo network callExplicit permissionsDefault-off historyVersioned trends
PERSONAL TREND, NOT MEDICINE

A responsible boundary is part of the algorithm.

THI does not measure human worth, character, discipline, fitness, or productivity. It is not a diagnosis, prognosis, treatment recommendation, medical-device output, or substitute for professional care.

It must not be used for employment, insurance, eligibility, ranking people, or other consequential decisions. A higher number means only that the eligible inputs map to a higher value under this documented version of Arzenal’s product heuristics.

ARZENAL FOUNDATION

Implemented, tested, and visible across phone and watch.

CodenameStranding contains the versioned data contracts, pure calculation use case, golden-vector tests, local history repository, database migration tests, Home tile, Insights route, reusable gauge, and Wear OS Human Index surfaces.

THE TWO INDEX SYSTEM

From human context back to the game.

The Gamer Index uses separate dimensions and mathematics to describe a player’s evolving gaming-performance profile.