Your iPhone’s key apps could soon start charging you a monthly fee—thanks to a new trend that consumer advocates are calling a direct threat to your wallet. Tech insider Nick Bilton warns that every app and service you use may follow the streaming model, with subscriptions for essential features like messaging, photo editing, and navigation. He says this shift quietly trickles down to your daily expenses, forcing even basic apps to demand $5 to $10 a month—or lock you out. Consumer advocates urge you to check your app updates now before you’re nickel-and-dimed.