I assume that your referring to creating a KIDS app when you say build. I do that and I also can monitor the time of the last LOCTMS and/or LOCNTMS read. Example...
A1: Stop Location [ Source:Any ]
A2: Get Location [ Source:Any Timeout (Seconds):240 Continue Task Immediately:OFF keep Tracking:On ]
<locloop>
A3: Flash [ Text:GPS - %LOC Long:Off ] If [ %LOCTMS > %LOCNTMS ]
A4: Flash [ Text:NET - %LOCN Long:Off ] If [ %LOCNTMS > %LOCTMS ]
A5: Variable Set [ Name:%waittrigger To:%LOC|%LOCN Do Maths:Off Append:Off ]
A6: Wait Until [ MS:0 Seconds:15 Minutes:0 Hours:0 Days:0 ] If [ %waittrigger !~ %LOC|%LOCN ]
A7: Goto [ Type:Action Label Number:1 Label:locloop ]
Switch GPS on and off and you will see the appropriate flash (GPS or NET) display.