This program is a GPS distance calculator that works via the ZIP code API address service. Tap the button for each of the two locations and enter in the ZIP codes. The program uses the ZIP Code API service to find the location and displays the GPS coordinates. The program then allows you to view the distance between the two addresses. The program uses the "The Vincenty inverse formula for ellipsoids." (accuracy to within 0.5mm, or 0.000015"). The ZIP code lookup is from

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To run these Pocket Visual Basic programs you need the free Microsoft Distribution Source Files located at




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(c)1998-2019 Vincent Collura ( Inventor / Engineer )