Privacy Policy

1. Core Principles of Data Non-Collection

We do not collect, harvest, or store personal data directly on our remote servers. Users are not required to register, create an account, or provide personal identifiers (such as names, phone numbers, or physical addresses) to fully access and utilize the core language practice features of our application.

2. Local Machine Architecture (Local Storage)

To optimize privacy and security, this application keeps your language practice data entirely decentralized and local. Your language choices, custom phrase settings, application configurations, and speech preferences are saved directly onto your own device's browser using industry-standard HTML5 local storage (Web Storage). This data remains on your physical machine and is never transmitted to or processed by our servers.

3. Analytics and Third-Party Data Tracking

To monitor system stability, optimize website performance, and understand user engagement, we utilize external third-party analysis tools. These services may change over time, and our data tracking infrastructure includes, but is not limited to, the following provider platforms:

• Cloudflare Web Analytics: This utility helps us measure aggregate website visitor volume and loading speeds. It is strictly privacy-focused, operates entirely without deploying tracking cookies, and does not capture or isolate any identifiable personal data.
• Google Analytics: This performance tool deploys essential cookies to capture anonymized diagnostic information regarding your browser type, device categories, and general app engagement patterns. This tracking dataset is transmitted to and handled by Google. You retain the right to entirely block this analytical tracking by installing the official Google Analytics Opt-out Browser Add-on provided by Google.

We reserve the right to introduce additional diagnostic, analytics, or infrastructure tools as necessary to support the technical operation of the Service, provided they align with our commitment to processing minimal data.

4. Compliance with Apple Developer Standards

This policy is structured to meet the transparent privacy standards mandated by the Apple Developer Program. We do not engage in cross-app tracking, nor do we package, sell, or rent user configuration records or system usage metrics to data brokers or advertising networks.

5. Contact Information

If you have any direct inquiries, clarifications, or technical concerns regarding this Privacy Policy or our operational data practices, please feel free to reach out via our official corporate communication channel at: contact@duangduangduang.com.