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While dedicated GPS units do not have "apps" they do have something called Points of interest (POI) files. These are files that you can download onto your GPS and then see them when you click on POI's. If you have a Garmin, the Garmin site has a free program called POI loader for your PC. Then you go to a site such as POI factory and download various POI files. You can get a file for all McDonalds or Walmarts or state parks or RV campgrounds. Even where is the next rest area on this highway. Best way to customize a GPS to your own needs. We brought back to use an old Garmin and use it all the time with the POIS loaded since our car/truck built in GPS does not have this feature
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