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Hello! We develop IOS application and it’s necessary for us to check if user changed the device time in Device settings or not. We use function "clock_gettime_nsec_np(CLOCK_MONOTONIC_RAW)" to check time and it works perfect. But I saw this function only here in Documentation(in discussion section): https://developer.apple.com/documentation/kernel/1646199-mach_continuous_time and this is for Mac OS so I want to know if I can use this function in IOS application that we are going to submit to App Store or we can face with some problems? For example this function can not work on some iPhones or on some IOS or we can have some problems during the review the application in App Store? Or maybe there are some alternatives function "clock_gettime_nsec_np(CLOCK_MONOTONIC_RAW)" for IOS? We tried to use ProcessInfo.processInfo.systemUptime but it counts only when device is awaken. So we can't use it to check if user changed the device time in Device settings or not.( Thank you for any help in advance!