Liferange 1.1

John Pavley ❘ Freeware ❘
iOS

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Liferange — A Reflective Life‑Clock and Biometer for Mindful Living

David Fischer

05/26/2026

Liferange maps your lifespan to a 12‑hour “lifeclock” and compares chronological vs biological age with a biometer, using user‑scored longevity factors to provide an inspirational, educational nudge rather than a scientifically rigorous prediction.

In this review, I assess Liferange as a longevity-oriented app that presents its ideas through two metaphors—the Lifeclock and the Biometer.

Lifeclock: The Lifeclock displays the span of a life on a 12-hour dial, from birth to an estimated death. The clock's position represents the user’s current age in hours, minutes, and seconds, offering a visual reference for the passage of time.
Biometer: The Biometer translates chronological age and biological age into a gauge. When the two hands converge, the ages align; when they diverge, the user may feel older or younger than calendar age, highlighting the potential gap between calendar time and physiological state.
Longevity factors and scoring: The model incorporates activity level, stress, risk behaviors, and genetics into an estimate of lifespan. Users self-score these factors on a 1–10 scale. The interface makes it easy to observe how changes in activity, stress, and risk behaviors could influence the estimated lifespan, while genetics are acknowledged as a less malleable factor (with genetics potentially changing in the future).
Model and scope: The app describes its approach as a toy model that uses metaphors grounded in current health and longevity research to illustrate how lifestyle choices may delay or hasten mortality. It is not a precise prediction tool.
Intent and limitations: Liferange is positioned as a source of inspiration, entertainment, and education rather than a medical or life-length forecast. Users should interpret its outputs as illustrative, not predictive.

Overview

Liferange is a Freeware software in the category Education developed by John Pavley.

The latest version of Liferange is 1.1, released on 05/25/2026. It was initially added to our database on 05/25/2026.

Liferange runs on the following operating systems: iOS.

Users of Liferange gave it a rating of 5 out of 5 stars.

Pros

Unique, memorable concept (lifeclock and biometer) that makes abstract lifespan concepts visually intuitive
Simple, focused design — easily glanced at to remind users about time and life priorities
Incorporates multiple longevity-related factors (activity, stress, risk behaviors, genetics) to produce a more nuanced estimate than a single calendar age
Interactive self-scoring encourages reflection and engagement with health/lifestyle choices
Clearly positioned as inspirational/educational/entertainment rather than a medical prediction, reducing potential for misuse
Lightweight iOS app (available on the App Store) — quick to install and use
Provides an engaging way to prompt behavior change by making abstract ideas concrete

Cons

Estimations are based largely on self-reported scores and a proprietary/simple model with limited hard data or peer-reviewed validation
Not evidence-based enough for clinical or serious predictive use — the author admits the model is speculative and likely to evolve
Potential to cause anxiety or fatalism in some users by visualizing remaining time in a dramatic way
Limited personalization — the model relies on a few broad factors and simple numeric inputs rather than richer biometric, medical, or sensor data
No mention of cross-platform availability (appears iOS-only), which limits reach to non‑Apple users
Unclear privacy/data policies from the available description (how user inputs are stored/handled is not documented on the pages fetched)
No indication of advanced features, integrations, or ongoing updates — may feel more like a novelty than a long-term tool for monitoring change

FAQ

What is Liferange?

Liferange is an iOS app that visualizes a human life span using a 12-hour analog "lifeclock" and a "biometer" to compare chronological and biological age. It's intended for inspiration, education, and entertainment.

How does the lifeclock work?

The lifeclock maps a person’s lifespan from birth to an estimated death onto a 12-hour analog clock. The clock’s current time represents your present age in hours, minutes, and seconds so you can visually see how much of that mapped lifespan has passed.

What is the biometer?

The biometer is a speedometer-style display that compares chronological age (calendar years lived) to an estimated biological age. When the two indicators align, your biological and chronological ages match; divergence suggests feeling older or younger than your calendar age.

What inputs does the app use to estimate lifespan and biological age?

Liferange asks the user to self-score several longevity factors—activity level, stress level, risk behavior level, and quality of genetics—on a 1-to-10 scale. The app incorporates these inputs into its internal model to adjust lifespan and biological-age estimates.

Is Liferange scientifically accurate?

No. The author notes there is limited hard data and that the model is a best-effort application of contemporary thinking about longevity. Liferange is explicitly for inspirational, educational, and entertainment purposes and does not predict actual lifespan.

On which platforms is Liferange available?

Liferange is available on the Apple App Store for iOS devices.

Do I need to provide sensitive personal data to use Liferange?

The app uses self-reported inputs (birth date and the longevity factor scores described). The publicly available description does not indicate collection of sensitive biometric data, but review the App Store listing and any in-app privacy information for details before entering personal data.

Can Liferange predict exactly how long I will live?

No. The app is not a prediction tool. It provides an illustrative estimate based on user-entered factors and the author’s model, and is intended to help users focus on time and lifestyle choices rather than serve as a definitive forecast.

How should I use Liferange to get the most benefit?

Use the lifeclock and biometer as visual reminders of time and as motivational tools: periodically update activity, stress, and risk-factor scores to reflect lifestyle changes, and use the feedback to guide healthier choices.

Where can I learn more or download the app?

You can read the app description and download Liferange from its App Store page (Liferange on the Apple App Store) or visit the developer’s page at pavley.com/liferange for more information.

David Fischer

I am a technology writer for UpdateStar, covering software, security, and privacy as well as research and innovation in information security. I worked as an editor for German computer magazines for more than a decade before joining the UpdateStar team. With over a decade of editorial experience in the tech industry, I bring a wealth of knowledge and expertise to my current role at UpdateStar. At UpdateStar, I focus on the critical areas of software, security, and privacy, ensuring our readers stay informed about the latest developments and best practices.

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