중학효영단어 개인정보처리방침

Overview

ReOn Solution (리온솔루션, “we”) provides the Android app “중학효영단어 (Hyoword)” (package ai.reonsolution.hyoword, the “App”) in compliance with the Korean Personal Information Protection Act (PIPA) and the Google Play User Data policy. This policy covers the App only. For our website, see the privacy overview.

The App has no sign-up or login, and we do not operate any server. The App’s own code does not send data to us or to any other server. All network traffic leaving the App comes only from Google’s ads SDK and the Google Play Billing library bundled in it.

Information processed and how it is collected

Information we collect directly

None. We do not collect or keep your name, email, phone number, account or learning history on any server. If you email us, we receive only your email address and message so we can reply (see Retention).

Information stored only on your device

To provide the App’s features, the following is stored in the App’s private storage (Android SharedPreferences). It is never sent to our servers and we cannot see it.

The App reads the device time zone to schedule notifications but does not store or transmit it. Word data and pronunciation audio are read-only files bundled with the App, not user data.

Information collected automatically by third-party SDKs

Google SDKs bundled in the App automatically collect the following and send it to Google when the App runs or when ads or payments are used. We do not receive or store it.

Information we do not collect

• Account information such as name, email or phone number (there are no accounts)
• Precise location, photos or files, contacts, camera or microphone input (no such permissions; dictation uses the keyboard, not speech recognition)
• Health or other sensitive information, or national identifiers
• Analytics or crash-reporting data (no such tools are used)

Purposes of use

• Learning features: saving progress, showing score charts, levels and the home greeting (on the device only)
• Review notifications: choosing wrong and studied words first (or other words from the word list if there is no study history yet) for local notifications (on the device only)
• Ads that keep the App free: used by Google to serve and measure ads and to prevent fraud such as invalid clicks
• Remove Ads: used by Google Play to process the purchase and restore it after reinstalling
• Support: replying to email enquiries

Retention

Disclosure to third parties

We do not collect or keep personal information, so we do not provide it to third parties. The Google SDKs listed in the next section collect data directly within the App, and Google processes it under its own Privacy Policy. Even if a law-enforcement authority makes a lawful request, the only user data we could provide is our email correspondence.

Processors and third-party SDKs

We do not outsource the processing of personal information. The App includes the following third-party SDKs, and each provider processes data under its own policy.

The App also uses open-source libraries for local notifications, background scheduling (AndroidX WorkManager), audio playback and on-device storage. They work only on the device and send nothing out. The App uses no analytics, crash reporting, Firebase or AI APIs.

International transfers

We do not transfer personal information abroad ourselves. However, the Google SDKs in the App send data abroad as follows, which we disclose under Article 28-8 of PIPA.

Recipient

Google LLC (privacy contact: Google privacy enquiries)

Country

United States and other countries where Google operates data centres

When and how

Over the internet (encrypted) at app launch, when ads are requested or shown, and on purchase or restore

Items

Device identifiers such as the advertising ID, IP address, device information, ad interactions, diagnostics, on Android 13+ interest topics and attribution data, purchase history

Purpose

Serving and measuring ads, fraud prevention, processing in-app payments

Retention

As set out in Google’s Privacy Policy

How to refuse

You can delete the advertising ID or opt out of personalized ads in device settings. The App has no switch to turn off SDK traffic at launch, so if you do not want any transfer, stop using (uninstall) the App. If you make no purchase, no payment data is transferred.

Device permissions

The only permission you are asked to grant is Notifications. If you deny it, every learning feature still works; only review notifications are not shown.

You can turn notifications off at any time in Settings › Apps › 중학효영단어 › Notifications. Notifications show English words, meanings and quiz options and may appear on the lock screen; adjust your lock-screen notification settings if you prefer.

The App does not request location, camera, microphone, contacts, photos/media or phone permissions.

Deletion

We keep no user data on servers, so there is no server-side deletion process. You can delete on-device data yourself:

• Per-grade reset: the reset button on a grade card on the home screen deletes that grade’s progress, scores and total correct answers, plus the wrong, reviewed and studied word lists and word cache shared by all grades. Other grades’ progress, settings, profile name and Remove Ads status remain.
• Delete everything: Settings › Apps › 중학효영단어 › Storage › Clear data, or uninstall the App. This permanently deletes all App data on the device and any scheduled notification jobs.
• Google backup copy: delete it in your Google account backup settings.

Support emails are permanently deleted from our mailbox when their retention period ends. Step-by-step instructions are in the account and data deletion guide.

Your rights

You (or, for a child under 14, the legal guardian) may at any time ask to access, correct, delete or stop the processing of personal information.

• On-device data: we do not hold it, so you can view, edit and delete it yourself in the App and in device settings. The profile name can be edited or cleared in the App’s settings.
• Advertising data processed by Google: reset or delete the advertising ID and opt out of personalized ads in device settings, and exercise your rights through My Ad Center and the Google Privacy Policy.
• Support emails and other requests: write to [email protected]. We will act without delay and within 10 days at the latest.

You may make a request through a representative; we may ask for proof of authorization.

Children under 14

The App is a study app for Korean middle-school students in grades 1–3. We assume that children under 14 use it, including first-year students who may be 12.

• We do not collect personal information such as names or contact details directly from anyone, including children, and there is no sign-up.
• The profile name is optional and stays on the device. We recommend children use a nickname rather than their real name.
• Google AdMob in the App collects the data described above to serve ads. Guardians can delete the advertising ID or opt out of personalized ads on the device, or buy “Remove Ads” to stop ads from being shown. Even after that purchase, the ads SDK still initializes at launch.
• In-app purchases go through Google Play, where parental controls such as purchase approval are available.
• Children under 14 should email us together with a legal guardian. Guardians can ask to access or delete a child’s support emails.

Security measures

• Data minimization: with no accounts and no servers, we hold no personal data that could leak from our side.
• On-device storage: learning data is kept in app-private storage that Android protects from other apps.
• Least privilege: no location, camera, microphone or contacts permissions.
• Encrypted transport: Google SDK traffic uses Google’s encrypted (HTTPS) connections.
• Support mail: handled only in an access-restricted mailbox and deleted after the retention period.

We recommend using a screen lock to protect against a lost or shared device.

Automatic collection and personalized ads

The App does not use web cookies. The Google Mobile Ads SDK, however, automatically collects device identifiers such as the advertising ID and ad interaction (behavioural) data, may use Privacy Sandbox Topics and attribution on Android 13+, and under Google’s default settings personalized ads may be shown. The ads SDK may also cache ad files in the App’s storage.

How to opt out of personalized ads

• Android 12+: Settings › Privacy › Ads › Delete advertising ID (Samsung: Settings › Security and privacy › Other privacy settings › Ads)
• Other devices: Settings › Google › Ads to reset the advertising ID or opt out of personalization
• Turn off ad topics, app-suggested ads and ad measurement (Android 13+): Settings › Privacy › Ad privacy
• Change settings in My Ad Center
• Buying “Remove Ads” stops ads from being shown.

Menu names vary by manufacturer and Android version.

Privacy officer and contact

Operator

ReOn Solution (리온솔루션)

Privacy officer

Representative, ReOn Solution

Privacy department

ReOn Solution Customer Support (privacy inquiries and complaints, by email)

Email

[email protected]

Remedies

For remedies against privacy infringements you may contact the following Korean bodies.

Changes and effective date

This policy may change when laws, App features or bundled SDKs change. We will post changes on this page at least 7 days before they take effect, or 30 days before for changes that materially affect your rights, such as collecting new data.

Effective date: October 6, 2026. The Korean version prevails if the two versions differ.