Atti service?-It is an automatic door system that maximizes security and convenience by installing it at the common entrance of an apartment or apartment building.- It is a convenient service using the Bluetooth function of a universal smartphone as it compensates for the inconvenience of pressing the previously set password and the difficulties that may arise from the method using a door lock card.-If you have a smartphone with the app installed by recognizing the signal at the door, the door will automatically open.-Only pre-approved users can pass through the door. Access history can be automatically managed.summary-Ati is an access authentication system through Bluetooth.- Atti, only authorized users pass through the door.-Supports both Android & IOS (iPhone)authority- For automatic door access, Bluetooth and location information must be turned on- If the apartment is approved after applying for the automatic door, you can use it after logging in again.- Separate personal information is not used for automatic door access, and only a separate encryption key is used to pass through the door.Regarding the use of location information.This app collects location data even when the app is closed or not in use to support the use of the automatic door function.This app collects location data only when the app is in use to support the use of the nearby store search function.