A step-by-step example:How the AgeTech Prism™ Works

A kit of small sensors for the home of an older adult who lives alone: a contact sensor on the front door, a motion sensor in the hallway, a pressure mat under the mattress, and a contact sensor on the refrigerator door. A hub learns the household's daily pattern and sends alerts when the pattern breaks. The kit has no cameras or microphones, and the resident wears nothing.

What enters the prism is the product's marketing promise, together with every public trace that lends the promise credibility or takes it away. For Hearthline Home, the public record holds a marketing site, a privacy policy, a user guide, a pricing page, and customer reviews. Each is quoted below, with what it does to the promise.

“Peace of mind, with no cameras.”

Hearthline Systems Ltd., home page headline, fictional

• Marketing page

  Home page, headline and first paragraph

  “Peace of mind, with no cameras. Hearthline Home learns the rhythm of a loved one's day and lets your Circle know the moment something is out of the ordinary.”Hearthline Systems Ltd., fictional

  Lends the promise credibility

• Product page

  What is in the box

  “Four sensors, one hub, no wearables. Nothing for your loved one to charge, press, or remember. Setup takes the Circle Owner about twenty minutes.”Hearthline Systems Ltd., fictional

  Lends the promise credibility

• Privacy policy

  Section 4, Who sees household activity data

  “Activity data is shared with the members of the Circle named by the Circle Owner. By activating the hub, the Circle Owner confirms consent to monitoring on behalf of the household.”Hearthline Systems Ltd., fictional

  Takes credibility from the promise

• User guide

  Setting up the Circle

  “Only the Circle Owner can add or remove members, change alert rules, or pause monitoring. Monitoring resumes automatically after a pause of more than 24 hours.”Hearthline Systems Ltd., fictional

  Takes credibility from the promise

• Wellness claim

  Insights page

  “Hearthline Insights flag early-warning changes in sleep, movement, and meals so your Circle can act before a small change becomes an emergency.”Hearthline Systems Ltd., fictional

  Takes credibility from the promise

• Pricing page

  Plans

  “A starter kit, then a monthly plan. Available direct and through participating home-care agencies. Requires home Wi-Fi and the Hearthline app on a Circle member's phone.”Hearthline Systems Ltd., fictional

  Adds context to the promise

• Customer review

  App store review, from a daughter

  “The bed alert at 3 a.m. told me Mom was up and had not gone back to bed. I called, she had fallen in the bathroom. This product paid for itself that night.”Hearthline Systems Ltd., fictional

  Adds context to the promise

The prism is the WHO's account of human functioning, mounted as fixed optics: Person, Activity, and Context. Every product passes through all three, always, in the same positions. The lenses stay the same from one assessment to the next; the promise and the evidence are what change.

Each lens separates the beam into rays. Each ray answers one question about how the product treats the aging person, and each answer is a placement on the same five-step scale, from Custodial to Generative. The scale describes whose agency organizes the relationship with the product.

1. Custodial · The person is managed. Decisions are made about them, for someone else's benefit.

2. Protective · The person is acknowledged; safety overrides their say.

3. Accommodating · The product adapts to the person's needs, still framed by what they lack.

4. Agentic · The person directs. Consent, control, and choice are built in.

5. Generative · The person contributes and matters to others, beyond receiving care.

The Person lens reads what the design claims about the aging adult: their body, their mind, their senses, their identity, their stage of life, and the people around them. Every placement below is an observation of the public materials, then the reading.

Functional engagementAccommodating

Public materials document a kit with nothing for the resident to wear, charge, press, or remember; the product removes physical demands from the resident. The placement reads Accommodating.

Cognitive accessibilityAccommodating

The materials state that the resident has nothing to learn or operate. For a resident with memory change, the materials describe one behavior: alerts about them flow to the Circle as before. The placement reads Accommodating.

Sensory accessibilityAccommodating

The resident has no interface, so the product places no perceptual demand on them. The app is described for Circle members. The materials include no accessibility statement for the app or the hub. The placement reads Accommodating.

Identity & AutonomyCustodial

Public materials describe alerts routed to Circle members' phones, setup performed by the Circle Owner, monitoring paused and resumed by the Circle Owner, and consent given by the Circle Owner on the household's behalf. No material describes an account, a view, a say, or a consent step for the resident. The resident appears in the materials as the source of the signal. The placement reads Custodial.

Life-stage fitProtective

Every material addresses one situation: an older adult living alone, watched over by adult children. No material describes a couple, a resident who is also a caregiver, or how the product changes as needs change. The placement reads Protective.

Social embeddednessAccommodating

The Circle connects the people around the resident to one another and to the pattern of the resident's day. In the materials, the resident's part in that connection is to be its subject. The placement reads Accommodating.

The Activity lens reads how the product fits the resident's daily life: the person, the home, and the activities that matter to them.

Person fitAccommodating

The materials speak to a resident's wish to stay at home with nothing to wear, and the product's form meets that wish. What the resident wants from the monitoring itself is absent from the materials. The placement reads Accommodating.

Environment fitAgentic

Public materials document sensors on a door, a hallway, a mattress, and a refrigerator, placed in an ordinary home in twenty minutes, with the rooms left as they were and the resident free of anything to wear or charge. The placement reads Agentic.

Occupation fitProtective

The product observes the activities of daily life (rising, eating, moving about) and reports on them. No material describes the product supporting the resident in doing any of those things. The activity the product serves is the family's watching. The placement reads Protective.

The Context lens rates how the design meets culture, economy, infrastructure, and the local organization of care. The rating describes the design itself, and it is the same wherever the product is sold.

Cultural fitProtective

The app is offered in English and Spanish. Every material assumes one model of aging: independent living under remote family oversight. No material addresses households where an elder is not watched over by children, or where monitoring by family is not the norm. The placement reads Protective.

Economic accessibilityAccommodating

The materials describe a starter kit followed by a monthly plan, sold direct and through participating home-care agencies. No public funding path or reduced-cost route is described. The placement reads Accommodating.

Infrastructure assumptionsProtective

Setup requires home Wi-Fi and the app on a Circle member's smartphone. No material describes what happens when the Wi-Fi drops, and no offline or cellular fallback is mentioned. The placement reads Protective.

Care-ecosystem fitAccommodating

Distribution through home-care agencies places the product inside an existing care arrangement, and agency staff can be Circle members. No material describes a handoff to clinicians or to emergency response. The placement reads Accommodating.

Every ray now has a position on the same five-step scale. The column shows the whole profile at once, including the strongest and the weakest treatment of the aging person.

With the spectrum in view, two pillars read it as a whole: where the product touches health, safety, and the systems of care, and whether anything measurable changes in the life it touches.

Care & ClinicalAccommodating

Where the product touches health and safety, it does so by inference: a broken pattern becomes an alert to family, who decide what to do. The materials describe no clinical pathway, no escalation to a professional, and no false-alert figures. The placement reads Accommodating.

Impact & OutcomesProtective

The Insights page describes early-warning changes that let the Circle act before an emergency. The materials name no study, trial, evaluation, or published result behind the claim; the review quoted above is the only outcome in the public record. The placement reads Protective.

ClassificationProtective

Twelve of thirteen rays average to Accommodating. Identity & Autonomy reads Custodial. A product's classification is held to one level above its weakest treatment of the aging person, so Hearthline Home lands at Protective.

The classification describes who directs the relationship with the product. How well the sensors work and how quickly an alert arrives are questions of evidence, and the Impact & Outcomes pillar records how much evidence the public record holds.