Realtime broadcasting air quality information for more than 180 countries. - Show air quality information for your current location. - Show pollen data & forecast for United States and Europe. - Air quality standard switching among US, China, UK and India standards. - Provide pollution & pollen alerts. - Show realtime air quality index on desktop icon. - Available on Apple Watch with Complications. Check out realtime air quality right on your wrist. - Provide iMessage Extension: share air quality information right in a conversation. - Connect with your Laser Egg air monitor, know about indoor air quality in your house. - Connect with your Philips Smart Air Purifier to check realtime indoor air quality and control your purifier from anywhere. - Connect with your Philips GoPure car air purifier. Air Matters is ad-supported. "Air Matters Premium" is an optional yearly subscription that remove ads and support future development. Current price for this premium service is $0.99 USD per year, and may vary from country to country. Your payment will be charged to your iTunes account, and your account will be charged for renewal 24 hours prior to the end of current period. Auto-renual may be turned off at any time by going to your settings in the iTunes Store after purchase. No cancellation of the current subscription is allowed during active subscription period. If you have paid to remove ads in previous versions of "China Air Quality Index", you can restore previous purchase to enjoy one year of premium service. Privacy Policy: https://air-matters.com/app/en/privacy_policy.html Terms of Use: https://air-matters.com/app/en/terms_of_use.html