CluefulPrivacy policy
Effective September 30, 2026
gig (sole proprietor Kim Dongjun, "we") runs Clueful. This policy explains what we process, why, for how long, and your rights, in line with Korea's Personal Information Protection Act and the App Store and Google Play rules.
1. What we process and why
Clue text you type in a round, to judge it and move Coco's hunch meter. A random device ID, to limit abuse. Your leaderboard entries are kept under your random progress ID (section 2), or under the device ID if backup is off. Leaderboard results (word, practice language, number of words and letters, seconds) and the optional display name you enter in Settings, to show world rankings. How you use the app (for example: app opened, round finished, paywall shown, purchase started), crash reports, the app version, device model, iOS version, language and general region (derived from a masked IP address), to understand what works and fix problems. These are processed by Google Analytics for Firebase and Firebase Crashlytics under your random progress ID and an app instance ID, never with clue text, without the advertising identifier, and are not used for advertising or tracking. Messages you send through the support form and, only if you give it, your email, to answer you. We do not ask for your name, phone number, contacts, location or photos, and we don't need an account.
2. Progress backup and what stays on your device
Your round history (word, date, mode, practice language, result, number of words and letters, seconds), XP, streaks, badges and settings (practice language, display name, daily goal) are kept on your device and also backed up on our server under a random ID. That ID is created on your device and stored in your iCloud Keychain, so a reinstalled app or another device signed in to the same Apple Account can restore your progress. It is not linked to your name, email or Apple Account, and we only store a one-way hash of it. Clue text is never included in the backup. Settings › Backup › "Delete my data from the server" deletes the backup and your leaderboard entries immediately; the app then stops backing up until you choose "Back up again". Reminder times and your consent choice stay only on your device. If you choose "Continue with Apple" in Settings (optional), we also store the anonymous user identifier Apple gives us for Clueful (and, for account deletion, the token Apple issues), so your progress follows your Apple Account. We do not receive or store your email unless you choose to share it, and your name stays on your device. Settings › Delete account removes this and all saved progress for every linked device.
3. How long we keep it
Clue text: not stored by us after judging. Leaderboard results and display name: until you ask us to delete them or we close the service. Progress backup: until you turn it off in Settings, or 2 years after you last open the app. Device ID usage counters: 90 days. Support messages: 1 year, then deleted.
4. Processors and transfer outside Korea
To run the service we use: TypeSafe AI, Inc. (United States) to judge clues with the Jev model; data sent: clue text and the candidate words, per round, over an encrypted connection; TypeSafe states it does not train models on this input and keeps it only as long as needed to provide the service. Cloudflare, Inc. (United States, global network) hosts our server and database; data: everything in section 1. Apple and Google process in-app purchases under their own policies; we receive no card details. Google LLC (United States) provides Google Analytics for Firebase and Firebase Crashlytics; data: usage events, crash reports, app instance ID, your random progress ID, device model, OS version, language and general region; kept up to 14 months (analytics) and 90 days (crash reports). RevenueCat, Inc. (United States) keeps track of Clueful Plus subscriptions and also sends purchase events (product, price, country) to Google Analytics; data: the random progress ID and your store purchase records (product, dates, transaction IDs, price and country). We ask for your explicit permission before your first judged round, and you can refuse by not playing judged rounds.
5. Deletion
If you signed in with Apple, Settings › Delete account removes your saved progress, your Apple link and your leaderboard entries from every device at once, and we ask Google to delete your analytics data. Without an account, "Delete my data from the server" in Settings deletes your backup and leaderboard entries, and you can ask us through the support page, with your display name, to delete your leaderboard entries; we do it without delay and confirm by reply if you left an email.
6. Your rights
You can ask to see, correct, delete or stop the processing of your information at any time through the support page. We answer within 10 days.
7. Security
Encrypted connections (HTTPS) for all traffic, access limited to the operator, and no clue text stored with your identity.
8. Children
Clueful is not directed at children under 14 and we do not knowingly collect information from them.
9. Privacy officer
Kim Dongjun, operator of gig. support@clueful.app or the support page.
Website
On clueful.app we use Google Analytics (web) to count visits, the page and campaign a visit came from (for example utm_source=tiktok) and clicks on the App Store button. In the EU, EEA, UK and Switzerland analytics cookies are off and only cookieless measurements are sent; ads features and Google signals are off everywhere. Clicks on the App Store button go through clueful.app/go, which records the source of the click and opens the App Store.
10. Changes
We announce changes on this page before they take effect.