Apple unveiled its latest gadgets at its big September event on Monday. We discuss the most interesting new features — including AirPods that can function as hearing aids and Apple Watch software that can help detect sleep apnea — and offer our advice on when to buy a new iPhone. Then, the best-selling author Yuval Noah Harari joins us to discuss his new book and his biggest fears about A.I. And finally, we crack open some criminal cases in a new segment we’re calling the Hard Fork Crimes Division. We’ll explain how one man made $10 million by manipulating music streaming services and how online instructions for building a 3D-printed gun have ended up in the hands of criminals around the world. Guest:Yuval Noah Harari, author of “Sapiens,” “Homo Deus” and “Nexus.” Additional Reading:Apple Unveils New iPhones With Built-In Artificial IntelligenceRussia Secretly Worms Its Way Into America’s Conservative MediaHe’s Known as ‘Ivan the Troll.’ His 3D-Printed Guns Have Gone Viral.The Bands and the Fans Were Fake. The $10 Million Was Real. We want to hear from you. Email us at hardfork@nytimes.com. Find “Hard Fork” on YouTube and TikTok. Subscribe today at nytimes.com/podcasts or on Apple Podcasts and Spotify. You can also subscribe via your favorite podcast app here https://www.nytimes.com/activate-access/audio?source=podcatcher. For more podcasts and narrated articles, download The New York Times app at nytimes.com/app.