JC STUDIO · RETRO TIMETABLEPrivacy Policy
Effective: 2026-10-02
1. Operator and scope
JC Studio provides Retro Timetable (오래된 시간표), Android package com.jcstudio.retrotimetable. Contact: whdcjf8172@gmail.com. This policy covers the app and this information website.
2. Records kept on your device
Schedule titles, dates, start and end times, repeat rules, colors and memos, completion marks, daily one-line notes, and your paper, display mode, language, sound, vibration, week start, time format and edit-lock preferences are stored in SQLite on your device. There is no account, login, developer-server sync, location, contacts, camera, microphone or push notification use. On first launch the app reads your device language, date and time zone to choose the display language and today's date; this information is not sent anywhere. JC Studio does not receive your schedules or notes, and they are not used for ad targeting.
3. Advertising and choices
The app may show a Google AdMob banner and frequency-limited interstitial ads. The Google Mobile Ads SDK may collect and share device identifiers including advertising IDs, IP addresses (which can indicate a general area), app and ad interactions, and diagnostics for ad delivery, measurement, fraud prevention and reliability. The app has no separate analytics SDK; the advertising SDK includes its own measurement. SDK transmissions use TLS.
In the EEA, the United Kingdom, Switzerland and other regions where consent is required, Google UMP (User Messaging Platform) presents your choices, and ads are requested only when the SDK permits it. Processing that requires consent relies on your consent, and every timetable feature works without it. In those regions, “Ad privacy choices” in Settings lets you change or withdraw your choices at any time. Declining personalized ads may still allow limited ads under the SDK's rules. Applicable US state privacy options are also presented through UMP. Android settings let you reset or delete your advertising ID.
4. Retention, deletion and backups
Records remain on the device until you delete schedules, use “Erase all records” in Settings or clear app data. Uninstalling may erase local data, which we cannot restore from a server. Android automatic app backup is disabled. Exporting a backup creates a JSON file of all records and hands it to the app or storage you choose in the share sheet. The app never uploads it automatically; if you choose a cloud or messaging provider, that provider's policy applies. Restoring replaces existing records after confirmation.
Interstitial ad display times are stored separately on the device for frequency limits, using only the most recent 24 hours. Erasing or restoring records does not reset these limits. Google controls retention and deletion of UMP consent information and SDK-collected data under its policies and tools.
5. Providers, international processing and this website
Google and providers involved in advertising may process data outside your country. Providers and purposes are described in the consent interface and Google's policies. Cloudflare Pages hosts this website and may process IP addresses and request details for delivery, security and operations. This site has no analytics scripts, forms, advertising or first-party cookies. If you email us, we use your address and message only to respond and delete them when no longer needed.
6. Your rights and protection
Depending on applicable law, you may request access, correction, deletion, restriction, portability, consent withdrawal or opt-outs concerning targeted advertising, sale or sharing. Manage local records in the app and advertising choices through app settings, Android or Google tools, or contact us for help. Where available, you may complain to your local supervisory authority. The app is not designed for children and does not knowingly request children's personal information.
7. Changes
We update this policy and its effective date when features or data handling change. Material changes will be announced in the app or on this page.