Effective date: November 2, 2026 Last updated: November 2, 2026
Lifedetox (the "Operator") operates the "Semiconductor Master" app (the "App"). This policy explains what personal information the App processes, why, and what choices you have. If this English version and the Korean version differ, the version that gives you more protection applies.
You can use some features, such as the semiconductor basics lessons, without signing in. When you sign in or buy a pass, the following information is processed.
| Category | Items | When |
|---|---|---|
| Account information | Email address, name (display name), profile photo URL, account unique identifier (UID) | When you sign in with a Google or Apple account |
| Pass information | Whether you have a pass, pass type (Lifetime or Season), Season Pass expiry date and time, payment status, user identifier at our payment service (RevenueCat) | When you sign in, buy, or restore a purchase |
| Usage records | Usage events such as app launches, screen views, lessons opened, games started and finished (scores), study days, role level-ups and promotions, daily quests completed, your choice on the first-launch sign-in screen (sign in or skip), paywall views, the pass type you selected, and purchase attempts; device and app version; app installation identifier | Automatically, while you use the App |
| Access records | Last access date and time, number of visits, number of visits per day, a random per-install identifier (generated when the App is installed) and operating system type | Automatically, each time you open or return to the App while signed in (stored with your account) |
| Study progress (backup) | Role-level XP and promotion records, completed lessons, self-ratings on interview questions, daily study records, missed-question and term review schedules, bookmarked terms, mock interview records, selected role, game, lab, and journey records, and checklists | While you study signed in (backed up to your account so you can continue on other devices) |
| Device registration | Model (e.g., iPhone 15) and operating system of registered devices, a device key (a device identifier mixed with your account so the original value cannot be recovered), when each device was added and last used, and when devices were removed | Each time you open or return to the App while signed in (to check how many devices use an account) |
| Push notification information | Push notification token (a per-device notification identifier), the notification topics you are subscribed to (language, role) | When you turn on "News alerts" |
| Usage environment | Selected role (career test result), whether you have a pass and its type, whether study reminders are on, range of lessons completed, app language | Automatically, while you use the App |
| Error information | Error details and code location when the App crashes or hits an error, device model, OS and app version | Automatically, when an error occurs |
If you are not signed in, the following is stored only on your device and is not sent to our servers. It is deleted when you delete the App.
If you sign in, the study progress listed under "Study progress" in Section 1 is backed up to your account. Answers, self-introductions, and 8D notes you write, your character nickname, career test answers, and study reminder settings stay only on your device even when you are signed in.