Air quality can be important to health, especially when there are persistent sources of pollution, allergens, and local events such as wildfires. While you can easily take a walk outside to check the air, the Air Quality Index (AQI) delivers a numerical reading of air quality from 0 to 500. The higher the number, the more dangerous the air can be for your health.

Nintendo has stopped selling in-app diamonds for its puzzle game Dr. Mario World. The company announced that the app is officially discontinued and gameplay will cease functioning on November 1, 2021. On that date, the game will show players a notification before it shuts off forever.

Google has launched its first iOS widgets to assist users with mapping and navigation. Google Maps offers two different widgets as of version 5.74 released yesterday. For anyone interested in one-tap access to popular Google Maps searches, or an instant traffic snapshot of the local area, update the Google Maps app now. Once updated, the new widgets can be installed on the home screen.

Just about every iOS update improves the Notes app with additions such as note sharing, password protection, tables, folders and more, making it a much more useful app. iOS 15 continues the evolution with the addition of Tags (think hashtags), which makes it a lot easier to find the note you're looking for. Now you can categorize your notes simply by adding a hashtag (or multiple hashtags) to them, then you can search by hashtag. Here's how to use hashtags in the Notes app on iPhone:

Apple has offered a variety of different wattage chargers over the years with its products. When it comes to the iPhone, most older models shipped with a 5W power adapter. This charger works, but it's not capable of performing a fast charge on any devices. Apple recommends a charger with at least 18W of power to accomplish fast charging rates.