Out of nowhere this week Nintendo released Dr. Mario World for mobile devices. This is the second iOS title to star Nintendo's mascot, Mario, the first being Super Mario Run. Unlike Super Mario Run, which was $10 for the full version, Dr. Mario World is free to download. Nintendo figured out there is more money in microtransactions than charging a one time premium fee. You can download the game from the Apple App Store.

Control Center has always offered the ability to quickly disconnect from WiFi or Bluetooth, but with the release of iOS 13 you can now quickly change WiFi networks. This is useful for a variety of obvious reasons, such as transitioning from your WiFi network at home to outside connections like work. Instead of navigating to the Settings app, you can now switch networks with a swipe and couple of taps. Here's how:

The Reminders app was given a complete overhaul with the release of iOS 13. The all-new design includes new features such as a "quick toolbar," enhanced Siri intelligence and Siri suggestions, the ability to add photos, documents, scans, and web links, and the ability to create tasks and grouped lists.

Tasks and grouped lists makes the Reminders app more useful by allowing you to add smaller tasks to larger groups. Say you wanted to do a little shopping, and you created 3 separate lists for the grocery store, Target and Home Depot. You could drag your 3 lists into one group titled Shopping and have them all in one place. Here's how to create a grouped list in iOS 13 and later:

The Google app on the iPhone, iPad or iPod touch now wipes its own history clean. Users of Google's iOS app can set up automatic expiration of search activity and location history. When configured in settings, this private data will be deleted after a set period of time. Once the option is set, no further action is required to delete history information from Google.