The only app that DOES NOT need internet to report accurate location of, just send SMS from your mobile, and get the location of the people whom you concern about, like:
1. Your kids,
2. Your elders that have alzheimer or in crowded areas
3. Others with self control disabilities
4. Your friend or relative who is lost somewhere where on internet available to share location via whatsapp or other social media apps.
5. Your driver who is in task,
6. Your sales people and governmate representative,
7. Many more….