Get the timestamp of creation time of the process which runs your application in iOS

GetCreationTime.swift

func getProcessStartTime() -> TimeInterval {
    let pid = ProcessInfo.processInfo.processIdentifier
    var procInfo = kinfo_proc()
    var cmd: [Int32] = [CTL_KERN, KERN_PROC, KERN_PROC_PID, pid]
    var size = MemoryLayout.stride(ofValue: procInfo)
    if sysctl(&cmd, UInt32(cmd.count), &procInfo, &size, nil, 0) == 0 {
        // tv_sec is timestamp measured in second; tv_usec is the rest fraction part in microsecond
        return Double(procInfo.kp_proc.p_un.__p_starttime.tv_sec) * 1000.0 + Double(procInfo.kp_proc.p_un.__p_starttime.tv_usec) / 1000.0
    } else {
        print("Can't get information of process \(pid)")
        return 0
    }
}