Card Manager Privacy Policy
Effective Date: September 28, 2026
Update Date: September 28, 2026
Introduction
The Card Manager (hereinafter referred to as "this application") is provided by the developer (hereinafter referred to as "us"). We deeply understand the importance of personal information to you and solemnly promise to protect your privacy and security.
The core design concept of this application is "local first, zero data collection" - you do not need to register or log in, all card data is stored in the internal storage space of your device through a local database (SQLite/Room), and we will not collect, upload, or share any of your personal information.
This privacy policy aims to explain to you in a clear and understandable manner how we handle your personal information (if any), your rights, and our contact information. Please read this policy carefully before using this application.
1、 What personal information do we collect
We will not actively collect, store, or upload any of your personal information.
This application is a purely local tool application, and all functions are completed locally on your device without involving any network data transmission. The specific explanation is as follows:
table
Explanation on whether information types are collected
Account information (name, phone number, email, etc.) is not collected. This application does not require registration or login
Device information (device ID, IMEI, MAC address, etc.) is not collected and no unique device identifier is read
Location information is not collected. This application has no location function
Address book, SMS, call records do not collect or access any communication related data
Albums and cameras do not collect or access media files
Usage behavior data (browsing history, click logs, etc.) is not collected without tracking, statistics, or analysis
Card data is not collected and is only stored internally on your device through a local database, without uploading to any server
2、 How do we use personal information
Since we do not collect any personal information, there is no situation where your personal information is used for any purpose.
Your card data (including card content, classification, labeling, sorting, etc.) is only stored in the internal storage space of your device in the form of a local database (SQLite/Room) (path:/data/data/<package name>/databases/), and is completely under your control. After uninstalling this application, the local database files will be deleted along with the application, and we will not keep any copies.
3、 Permission Usage Instructions
This application is a pure local card management tool that can achieve all core functions without applying for any system permissions.
We promise:
Will not apply for any permissions unrelated to card management functions;
Will not frequently pop up and harass or repeatedly apply for permissions.
4、 Third party SDK and data sharing
This application does not embed any third-party SDK and does not share, provide, or sell your personal information to any third party.
We will not cooperate with any advertisers, data analysis service providers, push service providers, or other third parties to collect your information. This application is an independently developed local tool and does not involve any form of data transmission to the outside world.
5、 Storage and Protection of Personal Information
storage location
Your card data is only stored locally in the internal storage of your mobile device (SQLite/Room database) and does not involve any cloud storage or cross-border transmission.
storage period
The data is continuously stored in the local database during your use of this application. When you uninstall this application, the local database files will be automatically deleted and we will not keep any copies.
safety measures
We take the following technical measures to protect your data security:
The data is only stored locally within the device and is not transmitted through any network;
Not collecting device identifiers and not generating user profiles;
The code does not contain any data reporting, tracking or tracing logic;
The local database files are protected by the Android system sandbox mechanism and cannot be directly accessed by other applications.
6、 Your rights
According to the Personal Information Protection Law, you have the following rights. Since we do not collect any personal information, the following rights are primarily achieved through your autonomous control over this application:
Access: You can view all the card data you have created at any time within this application;
Delete right: You can delete any card at any time, or uninstall this application to clear the entire local database;
Withdrawal of Consent Right: This application does not require any permission and there is no issue of revoking authorization;
Cancellation right: This application does not require registration and does not have an account system. Uninstalling the application is equivalent to terminating the service;
Complaint right: If you believe that we have violated this privacy policy, you can file a complaint with us through the contact information below.
We will respond and process your request within 15 working days after receiving it.
7、 Protection of Minors
This application does not actively provide services to minors under the age of 14, nor does it actively collect any personal information from minors.
If the guardian discovers that a minor has used this application without consent, they can contact us through the contact information below and we will assist in handling the relevant matters.
8、 Update of Privacy Policy
We may update this privacy policy in a timely manner based on changes in laws and regulations or adjustments to the functionality of this application.
When significant changes occur (such as adding new data collection types, adding third-party SDKs, etc.), we will notify you again through prominent means such as in app pop ups and obtain your explicit consent.
The latest version of this policy will always provide access points within this application, which you can check at any time on the application settings page.
9、 Contact Us
If you have any questions, opinions, or suggestions regarding this privacy policy, or wish to exercise your personal information rights, please contact us through the following methods:
Contact email: mailto: bdbbuy@gmail.com
We will reply within 15 working days after receiving your email.