"After using app. turn off gps and sync to save battery."
It will take couple of times to work depending on os version.
Its a workaround for the battery drain bug caused by Services / Android OS / Android System.
Services is the background task on Android phones that keeps all of the company's services in sync and updated. This covers basic environment, among other services which results in heavy battery drain of your device.
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For all the thanx mailers - happy it worked for you !
Application doesn't harm the device in anyway.