Privacy Policy

1. Operator and contact

These apps are operated by G-Prep Inc. Contact app-support@g-prep.co.jp about their handling of data.

2. Records in the app

The apps store studied, favorite and known words, review schedules, mistakes and timestamps, personal terms and lists, resume positions, and appearance and speech preferences on your device. Temporary state needed to continue an activity is also handled on the device.

The apps do not automatically send these learning records to a G-Prep server. The current version has no app account registration, advertising or tracking SDKs, or G-Prep-operated analytics or crash-report uploads. There is no automatic synchronization. Bundled content and saved records can be used offline. Websites, email and cloud document locations use their respective services.

3. Pronunciation and speech

When you request speech, the app passes the selected word, meaning or example to the text-to-speech service selected on your device. This includes personal words or meanings if you choose to read them aloud. The app selects installed offline English voices. Playback may fail if a required voice is missing; downloading voice data may require internet access.

The speech service operates under your device settings and its provider's policies. The apps do not record your microphone or upload voice recordings to G-Prep. The apps do not extract system dictionary text or voice audio for redistribution.

4. Manual backups

Settings → Export progress exports progress to JSON. Import progress accepts a supported backup for the same product. These files include learning records, personal terms and lists, mistakes and timestamps. Import shows a preview and requires confirmation before replacement. GMAT and GRE backups are separate.

You choose a location using Android's file picker. It may offer local storage or a cloud service you use. The selected provider handles the file. The app does not upload it to a G-Prep server for this operation. Exported JSON is not encrypted by the app. Access controls, transport and deletion depend on the chosen provider.

This is a manual backup and does not automatically transfer iOS purchases or existing history. Copying an exported file does not keep it up to date automatically.

5. Retention, deletion and recovery copies

Records remain until you remove or reset them or clear the app's data. Reset empties the active profile. Before import or reset, the app keeps a private recovery copy to protect against mistaken replacement. These copies have no automatic expiry and are not removed by resetting the active profile.

Session copies used to resume an activity may remain on the device until replaced by the next session of the same kind. A pending export copy is normally removed after completion or cancellation and retained after a failure for recovery.

Use Android Settings to clear the app's storage to remove its private data together. Uninstalling also removes private app data, but exported files and their copies are separate. Delete them through the relevant file manager or cloud provider.

6. Android backup and device transfer

The app disables automatic OS cloud backup and excludes its private data and app-specific external storage through supported Android backup and device-transfer settings. This does not guarantee identical behavior by every manufacturer or OS migration feature. Copies you exported yourself are outside these exclusions.

7. Google Play installation checks

Google Play may check that your copy was obtained through Google Play. Included study materials and local progress remain available offline, but the Play Store may need to reconnect if it has been offline for a long period. If an installation check appears, reconnect the Play Store and use the Google account that obtained the app. Keep your app data; clearing it is not a troubleshooting step for this check.

Google Play handles purchases, installation and its checks under Google's policies. The apps do not receive your payment-card details through Google Play.

8. Support and external pages

Support opens an external email app or website. Learning records are not automatically attached. Email addresses, messages and attachments you choose to send are used to respond to your request. Avoid unnecessary personal details. Contact the address above to ask about or request deletion of support correspondence. Websites, email, speech and document providers also have their own policies.

The support website has no Wordbook account, advertising or added analytics scripts. Its hosting services process technical request information, such as an IP address and browser details, to deliver and protect the site.

9. Changes

We will update this policy and the app's notices when data handling changes.

Trademarks

GMAT is a trademark of the Graduate Management Admission Council. GRE is a registered trademark of ETS. Wordbook is not affiliated with, endorsed by, or approved by either organization.