App Name：DDadmin

Developer Name：Langtao Digital Co., Ltd.

Contact information：400 005 8399

We fully understand the importance of personal information to you, we respect and protect your privacy. Please read and understand “Privacy Agreement” (hereinafter referred to as "this Agreement") before using our products (or services). You must agree to all the terms of service of this agreement before you can use the products and services of DDadmin.

You are committed that you are an adult when you start using this product/service. If you are a minor, your guardian is required to agree to your use of the app and agree to all the applicable terms of application.

This agreement as our promise to protect your personal information will be strictly enforced. I hope that you can feel safe and use our services with confidence.

1.Collection and use of personal information

The information we collect will only be used for the purposes set out in this Agreement. Collect and use your personal information, which will be used for providing and optimizing services to you and protecting your account.

1.1 User Account Information

Personal data that are collected while creating a DDadmin account may include the information like your email address or mobile phone number. These information helps to activate, manage and get service of DDadmin. Your nickname, profile picture, country and time zone will be connected to your account so that you can visit our product and service conveniently.

1.2 User Mobile Phone Information

Your phone model, operating system, unique device identifier, DDadmin application version number, location-related information (such as IP address, GPS location, and Wi-Fi access point that can provide relevant information, Bluetooth etc.) will be collected to enable PUSH notification. And these are very necessary basic information which we have to collect from you.

1.3 Device Information

All the device information will be collected so that you can control them via APP remotely.

1.4 Feedback

In order to implement the online feedback function for the current problems of the DDadmin application, we need to collect the following information: log information of the application and device and your contact information. The log information of the application and the device includes the device status, the information sensed by the sensor device, the device operation record, and the device number (the unique identifier after the device is registered). The purpose of collecting such information is to facilitate analysis of the current cause of the problem. The purpose of collecting your contact information is for follow-up visits, to find out if the problem is completely resolved, or to contact you and hope that you will supplement the necessary additional information. If you do not provide this type of information, we will not be able to effectively locate and resolve your feedback.

2.Instructions for calling permissions of the App

When you are using the DDadmin App certain functions may trigger different phone permissions. In order for you to better manage your information, we will inform you of the purpose of using the permission when you apply for the permission in the product use process, and the possible impact on your use of the service if you do not enable the permission, please check carefully. Before you use specific functions, you can choose whether to authorize the following permissions. At the same time, you can change the authorization status at any time through the device's permission settings page.

2.1 The following is the detailed description of related functions and calling permissions

1) Read and write external storage space (Android version)

It is used to read and write photos and files on the device in functions such as scanning QR codes, snapshots, and videos.

2) Location permission (Android, iOS version)

It is used to discover a list of nearby WLAN signals.

3) Camera permission (Android, iOS version)

It is used to scan the QR code for device installation and other functions.

4) Microphone permission (Android, iOS version)

When the user operates the sound wave distribution network for the WiFi wireless device, or connects the added device to operate the pickup function of the audio and video intercom.

5) Read phone permission (Android)

It is used to generate the device identifier of the phone locally on the client side.

6）Auto start and context-start (Android)

In order to ensure that the Android phone can receive the notification when the App is closed or running in the background, this App adds a self-starting logic to make the App have a certain self-starting ability. This is necessary to ensure that the App can implement functions and provide services. This is necessary to ensure that the App can implement functions and provide service.

2.2 Third-party SDK service permission description

Permissions involved in the third-party SDK used by Android App:

- Application information: Package name, App version, App name

- Phone identification (READ_PHONE_STATE): used to identify the device (IEMI/MAC/Android ID) and count the number of devices

- Network status (ACCESS_NETWORK_STATE, ACCESS_WIFI_STATE): used to judge network status

- Storage (READ_EXTERNAL_STORAGE, WRITE_EXTERNAL_STORAGE): used to store information such as device identification and logs

- Phone manufacturer, phone model, phone memory, OS version, SDK version, phone attribution (country or region), SIM card operator, and current network type. Among them, the current network type and SIM card operator name are only read locally on the phone and will not be uploaded to the server

Permissions involved in the third-party SDK used by iOS App:

- Using the Internet (INTERNET): For data transmission

- Push permissions: used to provide push services.

2.2.1 Mobile Number Verification Service SDK

1) SDK description: Integrate the authentication capabilities of the gateways of the three major operators, realize one-click login or authentication based on the mobile phone number without user perception, upgrade the traditional SMS verification method, and improve user experience

2) Use business scenarios: Improve user registration and login experience