Micromorts
Terms of Use
last updated · May 13, 2026
These Terms of Use (“Terms”) govern your use of Micromorts (the “App”), which is operated by One Quark Media LLC, a California limited liability company based in San Francisco (“we,” “us,” “our”). By downloading or using the App, you agree to these Terms. If you do not agree, do not use the App.
1. What Micromorts is — and what it isn't
Micromorts is an educational tool that helps you build a sense of scale for everyday risk using two units: the micromort (a one-in-a-million chance of dying) and the microlife (30 minutes of life expectancy gained or lost).
Micromorts is not:
- A medical device
- A diagnostic tool
- A personalized risk assessment
- A substitute for advice from a qualified professional
- A prediction of what will happen to you, or to any specific person
Every figure in the App is a population-average estimate. Real risk depends on age, health, skill, equipment, behavior, and circumstance, and can differ greatly from the average. The App is for sense-of-scale reasoning and general education only.
2. Acceptable use
You agree not to:
- Reverse engineer, decompile, or attempt to extract the source of the App beyond what is permitted by applicable law
- Present Micromorts’ figures as personalized medical, safety, or actuarial advice when communicating with others
- Use the App or its figures to harass, pressure, shame, or harm any person
- Resell, sublicense, or distribute the App without permission
3. The risk database
Micromorts ships with a curated database of risk entries. These figures:
- Are approximate and educational, drawn from published risk research — including David Spiegelhalter’s work on risk, Spiegelhalter & Pearson’s “Microlives” (BMJ, 2012), and standard transport and public-health statistics
- Are population averages for sense-of-scale reasoning, not personalized risk
- May be refined as we update the database; each entry names its source
Reasonable experts may disagree on specific figures, and estimates vary between sources and over time.
4. The Ledger
The Ledger lets you log activities and shows running tallies of micromorts “spent” and microlives “banked.” These tallies are illustrative sums of population-average values — they are not a measurement of your actual mortality risk, your life expectancy, or any change to either. Treat the Ledger as a thinking tool, not a health metric.
5. Intellectual property
The Micromorts App, name, logo, and the selection and arrangement of its curated database are the intellectual property of One Quark Media LLC. The underlying statistics are drawn from public sources, which are cited in the App.
You retain ownership of the entries you log in the Ledger.
6. Third-party services
The only third party involved in the operation of the App is Apple, for App distribution. This version of Micromorts makes no network calls and integrates no other third-party services.
7. Warranty disclaimer
The App is provided “as is” and “as available” without warranty of any kind, express or implied, including without limitation any warranty of merchantability, fitness for a particular purpose, or noninfringement. We do not warrant that the App’s figures are accurate, complete, or current.
8. Limitation of liability
To the fullest extent permitted by law, One Quark Media LLC shall not be liable for any indirect, incidental, special, consequential, or punitive damages, or any loss of profits or revenues, arising out of or related to your use of the App, even if advised of the possibility of such damages.
Our total liability arising out of or related to these Terms is limited to the amount you have paid for the App in the twelve (12) months prior to the event giving rise to the claim, or USD $50, whichever is greater.
9. Health and risk disclaimer
Micromorts is for educational purposes only. It is not medical, safety, or actuarial advice, and must not be used as a substitute for advice from a qualified professional. Do not make decisions about medical care, activities, or safety based solely on the App’s figures. Consult a qualified physician or relevant professional for guidance specific to your situation.
10. Changes to these Terms
We may update these Terms from time to time. If we make a material change, we will update the “Last updated” date and surface the change in the App when you next open it. Continued use of the App after a change means you accept the updated Terms.
11. Governing law
These Terms are governed by the laws of the State of California, United States without regard to its conflict-of-law principles. Any dispute arising out of these Terms or your use of the App will be resolved in the state or federal courts located in San Francisco, California, and you consent to that jurisdiction.