Tracker will locate any Android phone. It will also track movement of a phone to form a trip that can be viewed on your phone and on Google Earth. The trip is similar to a breadcrumb trail.
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You must read this PDF
to properly use this app.
Once you do this you will understand that this is the best phone locator / tracker on Android.
What is Tracker for?
• Most common use is for parents who want to locate their children.
• People who want to locate friends or family members.
• Participants tracking the leader of a caravan.
• People who want to share their trips with others.
• Law enforcement tracking of undercover agents.
• Collecting and comparing of workout trips - running, biking, etc.