If you like your iPhone but hate the San Francisco typeface, developer Zhuowei Zhang has posted a neat tool to Github—an app that can temporarily “overwrite” the iOS system font with another one, giving your phone a new, non-Apple-sanctioned look.
The app doesn’t require any kind of jailbreak, but does need “iOS 16.1.2 or below” to work, since it relies on a kernel execution bug (CVE-2022-46689) patched in iOS 16.2. If you’ve already installed iOS 16.2—which we’d advise you to do, for security reasons—you won’t be able to experiment with the hack. Any font changes will be reverted by a device reboot, and apps that don’t use the default San Francisco typeface won’t change.
The app includes a number of pre-installed fonts, many of which seem designed to irritate the eyes of Apple’s UI designers. Comic Sans MS leads the charge in that regard, but Segoe UI (Windows’ and Microsoft’s default font of choice) and Samsung’s “Choco Cooky” (a distant cousin of Comic Sans) are also included. Custom fonts can be installed as long as they’re iOS-compatible.