Air Quality: Real Time AQI

This Android App shows the real time AQI (Air Quality Index) for +60 countries in the world. (Japan, South Korea, Hong Kong , Thailand, Vietnam, Singapore, India, Mainland China, Taiwan , Malaysia, ....)
Its sources are

The US Embassy PM2.5 data is used for Shanghai, Beijing, Chengdu and Guangzhou.
The China Ministry Environment Pollution Departement PM10 data is used for all other cities in China.
For Hong Kong and Taiwan, the respective Environment agencies PM2.5 data is used.
For Singapore, the Singapore National Environment Agency PM2.5 data is used.