I need an application I can use mainly on IPHONE or ANDROID to manage a GPS tracking system.
A GPS tracking system received commands by SMS and send an answer by SMS.
I need something very simple I can adapt easily by editing the source code to any GPS tracking system to configure the commands and to extract information results I need.
For the customer you click a button on the smartphone and you get for example a position on google map or you get a level or a value.
To be independent of the phone for SMS I would like to use a bulk API like https://www.clickatell.com/resourc