APP  introductions: This is an APP that provides the positioning of people, pets or assets. Through the APP, you can get the real-time location of device and interact with the device. Main features: 1. Real-time positioning: you can see the real-time location of the device on the APP 2. Historical track: you can search the historical track of the device on the APP 3. Geo-fence: setup geo-fence on the APP 4. 4. One-button SOS:  After setting the SOS number on the APP, long press the SOS button on