CloudBreath is a web application for viewing the weather and air quality of any city in the world, all combined on a single screen.

Problem Solved If you want to know whether to go outside today, you often have to open a weather app and then open another app or website to check fine dust levels. CloudBreath gives you both instantly: temperature, chance of rain, and pollution levels, along with easy-to-understand advice like whether to wear a mask or limit outdoor activities.

Main Features

• Current weather, hourly forecast for the next 24 hours, and a 7-day forecast, with temperature and chance of rain charts.
• Air Quality Index (AQI on the US or European scale) along with the concentration of each pollutant such as PM2.5, PM10, O₃, NO₂, SO₂, CO, compared to WHO recommended thresholds.
• Save favorite cities and quickly compare multiple cities side by side.
• Search for a city or use current location; share the exact city you are viewing via a link.
• Interface in Vietnamese and English, switch between °C/°F, sunrise and sunset times.

Who Should Use It Working professionals and students who want to check quickly before leaving home; people living in cities with poor air quality like Hanoi or Ho Chi Minh City who need to monitor fine dust; runners, cyclists, or those who exercise outdoors; parents with young children, elderly individuals, or those with respiratory conditions; travelers wanting to see the weather at their destination.

Getting Started It runs directly in your web browser, no installation or account creation is required. Just open the page, search for the city name or allow access to your current location. The interface has a responsive layout for mobile screens. Your choices (favorite cities, language, units) are saved directly in the browser.

What Makes It Different

• Weather and air quality are on the same screen, rather than split into two tools.
• The dynamic background changes according to real-time weather: stars and the moon when it’s clear at night, drifting clouds, rain, snow, or lightning during storms.
• You can compare multiple cities and send the correct city link to others.
• Data sourced from Open-Meteo, free, and ad-free.