This is a iOS app for YH9595.
The tracker is an assisted device.
When user press SOS button in tracker , device will call out/send sms/send push notify and update a newly position to the server .

People who received message can use this app to find out the position of user and offer all necessary assists.

This app support "share location" function
1. default is disable
2. when share location enable
a. people whom use same account will see the position of each other.
3. This function need GPS resource even it enter background.
User should disable it if not necessary.
( continuous usage of GPS will makes the battery to dry)