Privacy Policy
This is a translation; if it differs from the Korean original, the Korean version prevails unless mandatory law says otherwise.
Effective October 12, 2026
This is a previous version. See the current version
Lo-Fi Labs Inc. (“we”) operates the app Cat's Study (the “App”) and handles your personal information as follows, in line with Korea's Personal Information Protection Act.
1. What we process and why
| Account (everyone) | Random account ID, sign-up and sign-in times — to create your account and sign you in |
|---|---|
| Social sign-in (optional) | Account identifier, email, name (nickname) and profile photo URL shared by Google, Apple or Kakao — to sign in and keep your records across devices |
| Usage records | Focus records (start and end times, mode, category and task), tasks and categories, goals and streaks, your resolution, “one line about today”, coin and item history, time zone and language — to run the timer, stats, planner and rewards |
| Friends and crews (if used) | the name and ID (@) you use with friends, friend requests and friends list, blocks and reports, crew membership, invites and pats, visibility settings — to provide the friends and crews feature (section 2) and prevent abuse |
| Notifications (if turned on) | Device push token, notification settings, record of notifications sent — for alerts about friend requests and acceptances, and crew invites |
| Usage analytics | Feature usage (focus start, end and length, goals reached, coin and item use, friends and crews activity, etc.), app instance ID, approximate location inferred from IP, device, OS and app version — linked to your account ID for usage statistics and improving features (Google Analytics for Firebase, section 4). Text you type, such as task titles, your resolution or names, is not sent |
| Ads | Advertising ID, IP address, device information, ad views — collected directly by Google AdMob to serve and measure ads (section 5) |
| Created automatically | IP address and time of access, a random device number made by the App, app version — for security and troubleshooting |
| Support (if you email us) | Email address and message — to answer you |
We don't collect precise location, contacts, photos or files, or payment information (the App has no paid purchases). Focus and streak notifications are scheduled on your device; friends and crews notifications are sent from our server only if you turn them on. The current version does not send error reports anywhere.
2. What friends and crews can see
The App has no boards, posts, comments, chat, messages or photo uploads. The friends and crews feature is available only to users who have linked an account and agreed to the rules (section 5 of the Terms), and shows each other only the fixed information below.
- Anyone who knows your ID: your name, ID and your dressed-up cat
- Friends: your room theme and decorations, and your record calendar (last 92 days)
- Crew members: your name and cat inside the crew, and who gave a pat. Your room and record calendar are not shown.
- Anyone who knows a crew code: the crew name, number of members, how many focused today, and members' cats (without names)
- Depending on your visibility settings: whether you're focusing and for how long · what you're doing (task title · category only · hidden) · records (today's and this week's focus time, this week's attendance, streak). You set each of the three to “Everyone · Friends & crews · Only me”.
Until you confirm what's shared when you first turn the feature on, everything is “Only me”. The defaults are “Friends & crews · Category only · Friends & crews”, and you can change them any time in settings. Your task list, resolution, “one line about today”, and coins are never shown to anyone. You can remove, block or report a friend at any time; once you block someone, you also can't see each other in crews. You can leave a crew at any time.
3. Retention and deletion
- Account and usage records: until you delete your account, then deleted immediately (including items you deleted in the App).
- Detailed focus events: details are cleared after 365 days.
- Friends and crews: deleted when you remove a friend, leave a crew or delete your account. Pats are deleted after 14 days, and declined invites after 30 days.
- Reports: information pointing to you in reports you made is deleted when you delete your account. Records of reports other users made about you (reason, your name at the time) are kept for 1 year after handling, to stop people from deleting their account and signing up again to repeat the same behavior.
- Push tokens: deleted when you sign out or delete your account, or if not refreshed for 270 days. Records of notifications sent: 30 days.
- Usage analytics: event data is deleted by Google Analytics after 2 months (aggregated reports follow Google's policies). When you sign out or delete your account, the analytics identifier on your device is reset.
- Support emails: 1 year after the inquiry is closed. Access logs: deleted automatically after our server provider's short retention period.
- Anonymous accounts are not deleted from the server when you delete the App, so please delete your account first.
Deleted data is erased so it can't be recovered; backup copies are overwritten on the backup cycle.
4. Sharing, processors and transfers abroad
We don't sell your personal information or give it to third parties (except where the law requires). The companies below process data for the service, which involves transfers outside Korea.
| Supabase, Inc. | Server and sign-in hosting (processor) · account, usage, friends and crews, and notification data in section 1 · US company, stored in Singapore (ap-southeast-1) · until account deletion · contact |
|---|---|
| Google LLC (Firebase Cloud Messaging) | Delivering friends and crews notifications (processor) · device push token, notification text (sender's name, crew name) · United States · after delivery, per Google's policies · contact |
| Google LLC (Google Analytics for Firebase) | Usage statistics and improving features (processor) · usage analytics data in section 1 · United States, sent from time to time while you use the App · event data 2 months · contact |
| Google LLC (AdMob) | Serving, measuring and protecting ads · ad data in section 1 · United States · per Google's policies · contact |
Data is sent over an encrypted network when you use the App or load an ad. If you don't want it transferred, you can delete your account (the server transfer is essential to the service). You can opt out of personalized ads as described in section 5. Social sign-in is also covered by the policies of Google, Apple and Kakao.
5. Personalized ads, analytics and your choices
- The App shows banner ads, and rewarded ads you watch only when you choose to. Your focus records and tasks are never used for ads.
- iOS: if you don't allow tracking, we request only non-personalized ads (Settings > Privacy & Security > Tracking).
- Android: delete or reset your advertising ID in Settings > Google > Ads.
- EEA, UK and Switzerland: choose in Google's consent form shown before your first ad. We and this website don't use cookies.
- Usage analytics doesn't use the iOS advertising identifier (IDFA) and isn't used to personalize ads (we don't link it to Google ads). The App has no separate switch to turn off analytics only.
6. Your rights
- View and edit your records in the App, and export them with Account tab > Export records (CSV).
- Delete everything immediately with [Delete account] at the bottom of the Account tab (how).
- You can also email us to access, correct, delete or restrict your data; we'll respond within 10 days after verifying it's you. Users in the EEA, UK and Türkiye may also complain to their local data protection authority.
7. Children
The App is not directed at children under 13, and in Korea it may be used by people aged 14 or older (section 2 of the Terms). We don't ask users their age. If we learn that information of a child under 14 in Korea, or under 13 elsewhere, has been processed without a parent's or guardian's consent, we delete it without delay. A parent or guardian who knows their child has given us information can ask us to check or delete it at support@catsstudy.com.
8. Security
Encrypted connections (HTTPS), database rules that let each user access only their own data, and minimal admin access. We never receive your passwords.
9. Contact
Controller Lo-Fi Labs Inc. (주식회사 로파이랩스) · Privacy officer Cho YunJik · support@catsstudy.com
Help in Korea: Personal Information Dispute Mediation Committee 1833-6972 · Personal Information Infringement Report Center 118 · Supreme Prosecutors' Office 1301 · National Police Agency 182
10. Changes
When this policy changes, we'll post the update on this page with its effective date.
- October 12, 2026: We no longer collect your birth year when you turn on friends and crews, and we have deleted all birth years already collected. We revised the children section (section 7).
Posted October 12, 2026 · Effective October 12, 2026
Previous versions: effective October 8, 2026 · effective September 28, 2026