Breathable Air Quality Widget

I find this widget very helpful. One needs to renew the keys on once a year.

For an asthma sufferer like me, this is fantastic, to have an AQI index right on my Lock Screen. I no longer have to look up the stat DEQ app to find out whether or not I should stay indoors.

I bought this when it was a paid app. It’s been extremely helpful for years. What a kindness the developer has done making it free for everyone!

Really good app. Super easy to set up. Don’t know what that other review is complaining about, getting API key was really obvious

I thought recommended meant I could use only the AirNow API with this app. I admit it is my mistake. However, the documentation could be improved. It seems like a useful app. Spreading awareness is great. Thanks regardless. What I am asking is: why is an AirNow key insufficient by itself and what exactly does that US organization provide that the global API does not? [Edit: thanks for the answers. Second edit: as of 2025 August 3 it seems AirNow is down. IQAir remains. Breathable works for me!]