Terms

Last updated 7 August 2026

Breathing Index is a diary lens on public air data — not medical advice. Trust your symptoms and your asthma action plan over anything on this screen.

What this is

A free tool that shows public air quality data and predicts a 1–4 rating from your own diary. It is informational. It is not a medical device, not a diagnosis, not a treatment plan, and not a substitute for a clinician who knows your lungs. Nothing here is a doctor–patient relationship.

If breathing feels dangerous, use your rescue plan and get help, whatever this app says. In an emergency, call your local emergency number.

The data is not guaranteed

Readings come from Open-Meteo (model output) and AirNow (stations), and I do not control, verify, or vouch for either. Model data misses hyper-local smoke. Stations can be miles away. Averaging windows lag reality. The forecast on top of all that is an inference from a handful of your own taps, and on day one it is population breakpoints with your name nowhere in it. Treat every number here as a hint that could be wrong.

Provided as-is

This app is provided "as is" and "as available", without warranty of any kind, express or implied, including any implied warranties of merchantability, fitness for a particular purpose, accuracy, and non-infringement, to the maximum extent permitted by law. It may be wrong, offline, or gone tomorrow. Your diary lives in your browser and can be erased by your browser — export backups.

Liability

To the maximum extent permitted by law, I am not liable for any damages arising out of your use of, or inability to use, this app or the data in it — including indirect, incidental, or consequential damages, and including any decision you made about going outside. You use it at your own risk and remain responsible for your own health decisions. Where law does not permit excluding liability, it is limited to the amount you paid for this app, which is nothing.

Use of the app

Use it however you like, for yourself. Don't attack the app or the services behind it, and respect the terms of Open-Meteo and AirNow when you use them through it. I may change or stop the app at any time. The source is public under its repository's license; these terms cover the hosted app, not the code.

Changes

These terms may change; the date at the top says when they last did. Continuing to use the app is acceptance of the current version.

Honestly

No lawyer has read this. I'm one person who built a tool for my own asthma and put it online, and this page exists because there should be one, not because a firm drafted it. It says what I actually mean: the air data is somebody else's, the prediction is a guess, your lungs outrank both, and if this app hurts you I can't make you whole. If something here reads as unfair or wrong, tell me and I'll fix it.

Contact

Drew Hoover — drewhoover.com · source