Your iPhone has hidden apps that work behind the scenes to filter SMS messages, trust computers, deal with payments, test ads, and perform other actions. You won't find any of them in your App Library, but there are tricks you can employ to unlock and use some of these secret apps. Siri is technically an app, and so is Setup (which sets up the iPhone after a restore), Screen Time (which lets you manage your iPhone usage), and Spotlight (the search tool on your Home screen) — but you should already know how to use those. Other apps you've probably used that don't resemble typical ones include... more
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