Virtual assistants usually hog the spotlight when it comes to talk of artificial intelligence software on smartphones and tablets. But Apple's Siri, Google Assistant, Samsung's Bixby and company aren't the only tools using machine learning to make life easier -- other common programs use the technology, too. Here's a quick tour through some common A.I.-driven apps and how you can manage them. When you set up a new device, you're usually invited to "enroll" in its facial recognition security program, which captures your image and analyzes it so the program will recognize you in different looks and lighting situations. Later, when you want to unlock the device or use apps like digital payment systems, the camera confirms that your face matches the stored data so you can proceed.