A new app offering to record your phone calls and pay you for the audio so it can sell the data to AI companies is, unbelievably, the No. 2 app in Apple’s U.S. App Store’s Social Networking section. The app, Neon Mobile, pitches itself as a moneymaking tool offering “hundreds or even thousands of dollars per year” for access to your audio conversations. Neon’s website says the company pays 30¢ per minute when you call other Neon users and up to $30 per day maximum for making calls to anyone else...