Privacy Policy

Lychee Intelligence Co., Ltd. ("we", "us", or "our") developed Word Battle (萬語典, "the App"). This Privacy Policy explains how we handle your data when you use the App.

Data Collection

The App has no account system — you never need to register or log in — and it has no ads.

To understand how the App is used and keep improving it, the App collects a small amount of anonymous usage statistics and crash reports (see "Third-Party Services" below). This data does not include your name, email address, or any account information, and we cannot use it to identify who you are.

Data Stored on Your Device

Your learning data is stored locally on your device, including:

• Learning progress — the study and review schedule state for each word
• Chapter and story mission progress — completed lessons, unlocked and completed missions
• Bestiary collection and region research progress — collected monster fragments, unlocked region content
• Adventure state — HP and potion counts
• App settings — e.g. the pronunciation auto-play toggle

This learning data stays on your device only. It is never uploaded, and we have no way to access it. If you have device backup features enabled (such as iCloud Backup or a Google account backup), this data may be included in your own backup, which is governed by that platform's own terms and privacy policy.

Network Connectivity

The App's learning and adventure features work without any network connection. Word and example-sentence pronunciation audio is bundled offline inside the App and played locally on your device. When a connection is available, the App uses it only to send the anonymous usage statistics and crash reports described below.

Save Export & Import

The Settings screen offers "Export Save," which produces a .json file containing your learning progress and hands it to your device's native share sheet, where you choose where to save or send it. "Import Save" uses the system's file picker to read a file you previously exported and restore your progress. This entire flow is triggered by you, and the save file never passes through any server of ours or any third party.

Third-Party Services

The App uses the following two services provided by Google:

• Google Firebase Analytics — collects anonymous usage statistics, such as App opens, which features and screens are used, progress milestones like finishing a lesson or a battle, and your device model and App version. We use this to understand how the App is used and to improve it.
• Firebase Crashlytics — when the App crashes or hits an error, collects the crash log, device model, operating system, and App version so we can find and fix the problem.

This data comes with a random identifier generated by Firebase, used only to tell installations apart. It is not linked to your identity. The App does not collect the advertising ID (IDFA/AAID), does not track you across apps or websites, does not sell this data, and does not use it for advertising.

This data is processed by Google. For details, see the Google Privacy Policy and Privacy and Security in Firebase.

Deleting Your Data

Your learning progress, settings, and collection data are stored on your device. Deleting the App removes all of it.

Anonymous usage statistics are retained by Google Analytics for a limited period and then deleted automatically. If you have any questions about this data, please email support@lychee.tw.

Children's Privacy

The App does not knowingly collect personal information from children. The only data we collect is the anonymous usage statistics and crash reports described above. The content is suitable for a general audience.

Policy Changes

If we make changes to this Privacy Policy, we will update the content on this page and revise the "Last updated" date. We encourage you to review this page periodically for the latest privacy information.

Contact Us

If you have any questions about this Privacy Policy, please contact us through:

• Email: support@lychee.tw
• Website: Contact page