iOS Question Location.Time GPS or IOS ?

Sub GPS1_LocationChanged (Location1 As Location)
    If Location1.Time > 0 Then
        gpsTime = DateTime.Now - Location1.Time
    End If
End Sub

Sub GpsTimer_Tick
    Dim Time As Long
    Time = DateTime.Now - gpsTime
    lblClock.Text = DateTime.Time(Time)
End Sub

'Code module
#Region  Project Attributes
    #ApplicationLabel: B4i Example
    #Version: 1.0.0
    'Orientation possible values: Portrait, LandscapeLeft, LandscapeRight and PortraitUpsideDown
    #iPhoneOrientations: Portrait, LandscapeLeft, LandscapeRight
    #iPadOrientations: Portrait, LandscapeLeft, LandscapeRight, PortraitUpsideDown
    #PlistExtra:<key>NSLocationWhenInUseUsageDescription</key><string>Used to display the current navigation data.</string>
    #PlistExtra:<key>NSLocationUsageDescription</key><string>Used to display the current navigation data.</string>
#End Region


#IgnoreWarnings: 17

'use the distribution certificate
#CertificateFile: ios_distribution.cer

'#Entitlement: <key>aps-environment</key><string>production</string>
#ProvisionFile: Adhoc.mobileprovision

Sub Process_Globals
    'These global variables will be declared once when the application starts.
    'Public variables can be accessed from all modules.
    Public App As Application
    Public NavControl As NavigationController
    Private Page1 As Page
    Private LocManager As LocationManager
    Private lblAccuracy As Label
    Private lblAltitude As Label
    Private lblBearing As Label
    Private lblEnable As Label
    Private lblHeading As Label
    Private lblLL As Label
    Private lblSpeed As Label
    Private lblTime As Label
    
    Public gpsTime As Long
    Private GPSTimer As Timer
End Sub

Private Sub Application_Start (Nav As NavigationController)
    NavControl = Nav
    Page1.Initialize("Page1")
    Page1.RootPanel.Color = Colors.White
    Page1.RootPanel.LoadLayout("2")
    NavControl.ShowPage(Page1)
    LocManager.Initialize("LocManager")
    
    GPSTimer.Initialize("GPSTimer",1000)
    GPSTimer.Enabled = True
End Sub

Private Sub LocManager_AuthorizationStatusChanged (Status As Int)
    lblEnable.Visible = (LocManager.AuthorizationStatus = LocManager.AUTHORIZATION_DENIED _
        Or LocManager.AuthorizationStatus = LocManager.AUTHORIZATION_RESTRICTED)
    StartLocationUpdates
End Sub

Private Sub StartLocationUpdates
    'if the user allowed us to use the location service or if we never asked the user before then we call LocationManager.Start.
    If LocManager.IsAuthorized Or LocManager.AuthorizationStatus = LocManager.AUTHORIZATION_NOT_DETERMINED Then
        LocManager.Start(0)
    End If
    LocManager.StartHeading
End Sub

Private Sub Application_Foreground
    StartLocationUpdates
End Sub

Private Sub Application_Background
    LocManager.Stop
    LocManager.StopHeading
End Sub

Private Sub LocManager_HeadingChanged (MagneticHeading As Double, TrueHeading As Double)
    If TrueHeading >= 0 Then
        lblHeading.Text = NumberFormat(TrueHeading, 1, 0) & Chr(176) & " (true north)"
    Else
        lblHeading.Text = NumberFormat(MagneticHeading, 1, 0) & Chr(176) & " (magnetic)"
    End If
    
End Sub
Sub LocManager_AllowCalibration As Boolean
    Return
End Sub

Private Sub LocManager_LocationError
    Log("Error: " & LastException.Description)
End Sub

Private Sub LocManager_LocationChanged (Location1 As Location)
    If Location1.VerticalAccuracy >= 0 Then
        lblAltitude.Text =    NumberFormat(Location1.Altitude, 1, 1) & "m"
    Else
        lblAltitude.Text = "N/A"
    End If
    lblBearing.Text = ValueOrNA (Location1.Bearing, 1, Chr(176))
    If Location1.Accuracy >= 0 Then
        lblLL.Text = NumberFormat(Location1.Latitude, 2, 4) & " / " & NumberFormat(Location1.Longitude, 2, 4)
    Else
        lblLL.Text = "N/A"
    End If
    lblSpeed.Text = ValueOrNA(Location1.Speed, 1, "m/s")
    If Location1.Time > 0 Then
        gpsTime = DateTime.Now - Location1.Time
    End If
    lblAccuracy.Text = ValueOrNA(Location1.Accuracy, 2, "m")
End Sub

Private Sub ValueOrNA(value As Double, NumberOfFractions As Int, unit As String) As String
    If value < 0 Then
        Return "N/A"
    Else
        Return NumberFormat(value, 1, NumberOfFractions) & unit
    End If
End Sub

Sub GpsTimer_Tick
    Dim Time As Long
    Time = DateTime.Now - gpsTime
    lblTime.Text = DateTime.Time(Time)
End Sub