this app should be a tracking and showing the speed of the one who is moving on Google map. The one who is moving can not have a mobile with but a small gps device. the one who is following is using a mobile but also the gps is possible to follow with computers google map.
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Hello! Nice to meet you! I am very professional android/ios/gps app expert that you are looking for. Let's discuss further details with me. Regards.