Privacy Policy

Effective September 28, 2026

BRIEF (formerly Kalling English, "we", "us") is an English job-interview practice app operated by SOUNDGYM Inc., a company in the Republic of Korea. You tell BRIEF about the position you are applying for, and an AI mock recruiter calls you to practice interview answers in English. This policy explains what information we collect to make that work, how we use it, how long we keep it, and the choices you have.

Information we collect

• Account information. When you sign in with Apple or Google, we receive your email address, your name (if you share it), and an account identifier from the sign-in provider. We never see your Apple or Google password.
• Interview preparation information. For each position you add: the company, role, and job description (JD) you enter; the work experience you type or confirm from a resume; the interview stage, date, and time; and your preferred practice length. You can save several positions. We also store the practice plan and practice criteria generated from this information.
• Resume files. If you choose a PDF or DOCX resume, the file is uploaded to our server only to extract its text, in an isolated process. The original file is not stored. The extracted text is shown to you, and it is saved to your account only if you review and apply it as your experience.
• Call schedule. Your preferred call days and time, and your timezone, so we can call you for practice.
• Call records and evaluations. The text of your calls (what you said and what the mock recruiter said), and the evaluation generated afterwards: which practice criteria your answers met, quotes from your answers used as evidence, suggested improvements, the next question, and translations. With each call we keep a copy of the JD and criteria used at the time, so editing a position later does not change past evaluations. We also record call dates and durations to apply the free-practice and daily limits.
• Voice audio. During a call, your voice is streamed in real time to Google's Vertex AI service to hold the conversation. We do not store recordings of your voice on our servers.
• Answer recordings (Premium, optional). If you turn on Record my answers in Settings, the app saves your side of each call as an audio file on your device. The mock recruiter's voice and muted periods are not recorded, but background sound during your answers may be. These files stay in the app's private storage on your device, are excluded from iCloud backup, and are never uploaded to our servers. The setting is off by default. You can delete a recording at any time from your call history.
• Earlier learning profile. If you used the app as Kalling English, we keep the preferences you set then (English level, interests, tutor name) and your past conversation history, so your existing history stays available.
• Device and notification data. Your device platform (iOS or Android) and push notification tokens, so we can ring you when it's time for your call.
• Usage and diagnostic data. To understand how the app is used and to fix problems, we collect in-app events (such as which screens you view and features you use) through Google Firebase Analytics, tied to an app-instance identifier, and crash reports and diagnostic details (device model, operating system version, app version, and a crash-specific installation identifier) through Google Firebase Crashlytics. This data is used only to run and improve BRIEF, not for advertising.
• Subscription information. If you subscribe to Premium, we receive a signed purchase record from the App Store or Google Play containing the product and expiry date. Payment itself is handled entirely by Apple or Google. We never see your card details.

Please don't include information you don't need for practice, such as your phone number, home address, or other people's personal information, in the JD, experience, or resume you submit.

How we use your information

• To provide the service: build your practice plan, place scheduled calls, run the mock interview, and generate evaluations, follow-up questions, and translations.
• To tailor questions to your position: the mock recruiter uses your JD, your experience, and your previous answers and areas to improve to choose the next questions.
• To keep your positions and history in sync across your devices.
• To send you call notifications at your chosen time.
• To apply free-practice limits and to verify and maintain your subscription status.
• To understand how the app is used and to diagnose and fix crashes and errors.

We do not sell your personal information, and we do not use your JD, resume, or calls for advertising. We do not share them with the companies you apply to.

Services we rely on

• Google: Google Sign-In; Vertex AI (the AI that holds your call and generates plans, evaluations, and translations); Cloud Text-to-Speech; Firebase Cloud Messaging (Android notifications); Firebase Analytics (usage analytics) and Firebase Crashlytics (crash and diagnostic reporting); and Google Cloud Platform, where our servers and database run.
• Apple: Sign in with Apple, Apple Push Notification service (iOS notifications), and the App Store (subscriptions).

These providers process data on our behalf under their own security and privacy commitments, which provide the same or an equivalent level of protection to the one described in this policy. Before your first practice call, the app asks for your consent to send your voice, call text, and the company, role, JD, and experience you entered to Google Vertex AI. This data is processed under the Google Cloud data-processing terms, and Google does not use it to train its foundation models.

Where your data is processed

• Republic of Korea. We are based in Korea, and our servers and database run on Google Cloud in Seoul. This is where your account, positions, call records, and evaluations are stored. Korea has a comprehensive data-protection law, the Personal Information Protection Act, enforced by an independent authority, the Personal Information Protection Commission.
• United States. Your voice, call text, and the position information sent to Vertex AI during calls and for plans, evaluations, and translations are processed by Google in the United States. Firebase Analytics and Crashlytics data may also be processed there. The United States has no single comprehensive federal data-protection law. Personal data is protected by sector-specific federal laws and by state laws such as the California Consumer Privacy Act.

Google processes this data on our behalf under the Google Cloud and Firebase data-processing terms. Under those terms Google processes the data only on our instructions, keeps it confidential, protects it with technical and organizational security measures, requires the same of its subprocessors, and deletes it when processing ends.

Data retention and deletion

• We keep your positions, call records, and evaluations while your account is active, so you can review past practice. Editing or removing information in a position replaces the saved version. Past calls keep the copy of the JD and criteria used at the time.
• You can delete your account at any time in Settings → Delete account. Your account is deactivated immediately and can no longer be accessed. Deleted accounts are not restored: signing in again with the same Apple or Google account starts a new account without your previous data. After 30 days, your account, positions, JD and experience, call records, and evaluations are permanently deleted.
• Subscription transaction records (platform, product, status, and dates) are kept after deletion for accounting and dispute purposes, with the purchase receipt removed and no link to your account.
• Answer recordings and app settings on your device are removed when you sign out or delete your account in the app, or when you uninstall the app.

To request access to, correction of, or deletion of your data, or to stop its processing, contact us at the address below and we will respond promptly. There is no fee for these requests. We may ask you to confirm that the request comes from the owner of the account.

Security

All traffic between the app and our servers is encrypted in transit (TLS), and data is stored on access-controlled cloud infrastructure. Each account can only access its own positions, calls, and recordings.

Children

BRIEF is not directed at children under 14 (16 in Japan, or the minimum age in your country, if higher), and we do not knowingly collect personal information from them. If you are under the age of majority where you live (for example, 18 in Japan and Taiwan), please use BRIEF with the consent of a parent or guardian, and have them review this policy before you agree to send your call data to Vertex AI.

Additional information for users in Japan

• We handle your personal information under the Act on the Protection of Personal Information for the purposes listed in How we use your information.
• Your data is handled outside Japan, in the Republic of Korea and the United States. See Where your data is processed for each country's data-protection system and the measures Google takes. The consent the app asks for before your first call is your consent to providing your call data to Google in the United States. You can ask us for more information about these measures.
• Our security measures include: a designated privacy officer; access to personal data limited to staff who need it; account-level access controls; encryption in transit; and choosing service providers after checking their data-protection commitments and the data-protection systems of the countries where they process data.
• You can ask us to disclose the personal data we hold about you (including records of providing it to third parties), to correct, add to, or delete it, or to stop using or providing it, by contacting us at the address below.

Additional information for users in Taiwan

Under Article 8 of the Personal Data Protection Act:

• Who collects your data: SOUNDGYM Inc. (see Contact).
• Purposes and categories: as described in How we use your information and Information we collect.
• Period: while your account is active, and up to 30 days after you delete it, except the subscription records described in Data retention and deletion.
• Area: the Republic of Korea and the United States (see Where your data is processed).
• Recipients and method: SOUNDGYM Inc. and the service providers listed in Services we rely on, by electronic and automated processing, including AI.
• Your rights: you can ask to review or get a copy of your data, to supplement or correct it, to stop its collection, processing, or use, or to delete it, by contacting us at the address below.
• If you don't provide data: you need to sign in to use BRIEF, and you need to enter a position and agree to send your call data to Vertex AI to take practice calls. Uploading a resume is optional.

Changes to this policy

If we make material changes, we will update this page and the effective date above, and notify you in the app where appropriate.

Contact

SOUNDGYM Inc. (주식회사 사운드짐), Unit 60A, 2F, 47 Gangnam-daero 112-gil, Gangnam-gu, Seoul, Republic of Korea. Representative and Privacy Officer: Mirim Lee.

Privacy Officer, SOUNDGYM: soundgym@soundgym.io