Privacy Policy

• Sign-up, sign-in, account management and verification
• Recommending stories that suit your child, and providing reading and listening features
• AI-powered features such as after-reading conversations and story creation
• Sending parent letters (reports) and service notifications
• Alerting parents when we notice a worrying sign in a child's conversation
• Fixing errors, preventing misuse and improving the service
• Answering enquiries and sending notices

Lento never requires a child's real name. Every feature works with a nickname.

You have the right to refuse consent. If you don't agree to the required items you can't create an account; optional items can be left blank and you can still use Lento.

Most Lento users are children under 14. Children cannot sign up on their own: a parent or legal guardian creates the account and enters the child's information, and we process a child's information only with that guardian's consent.

• Things your child says while reading may be quoted word for word in parent letters. We explain this, and how to respond to what your child shares, during sign-up.
• If your child says something is a secret, we don't show it in reports. But if your child seems to be in serious distress or danger, we will always tell you, even if it was called a secret.
• You can review, correct or ask us to delete your child's information at any time.

Once information is no longer needed we delete it without delay, in a way that cannot be recovered. If the law requires us to keep something (for example, payment records once paid plans exist), we store it separately for that period only.

Lento does not sell or share your personal information, and does not use it for advertising. The only exceptions are where the law requires it or law enforcement makes a request through legal procedures.

We rely on the providers below to run Lento. Where a provider's servers are outside Korea, personal information is transferred abroad. This outsourcing and storage is necessary to perform our service agreement with you (Personal Information Protection Act, Article 28-8(1)(3)), and we tell you about it and ask you to confirm when you sign up. Transfers happen over encrypted connections (HTTPS) when you use the service.

• AI requests are processed through Anthropic's commercial API and, under Anthropic's terms, are not used to train its models.
• We exchange information with Google for sign-in only if you choose to sign in with Google.
• If you do not want your information transferred abroad, you can close your account. Lento cannot run without these providers.

You can ask to see, correct, delete or stop the processing of your own and your child's information.

• View or edit your child's profile: Parent Zone › Child info
• Delete a child: Parent Zone › Manage children (you can undo for 15 days)
• Turn off notifications: My Page › Notifications (alerts about worrying signs can't be turned off, to protect your child)
• Close your account: Parent Zone › Settings › Close account (you can cancel for 15 days; after that we send a final letter for each child and permanently delete everything).
• Anything else (a copy of your data, restriction): email lento.support@gmail.com. We will verify it's you and act within 10 days.

• Encrypted connections (HTTPS) everywhere and security headers
• Passwords and parent/child PINs stored with one-way encryption
• Row-level access controls so no family can see another's data, plus active-child checks that keep siblings apart
• Parent-only screens locked with a PIN, with a short lockout after repeated failures
• Server secrets kept separate, and access limited to what's necessary

Lento only uses cookies that are essential: keeping you signed in, remembering which child is reading, and checking whether a PIN lock has been opened. Preferences such as language and captions are kept in your browser's storage. We use no advertising or tracking cookies.

You can block cookies in your browser, but you won't be able to stay signed in.

Voice input for parent notes uses your browser's or device's speech recognition. Lento never receives the recording, only the transcribed text.

We may ask to use your location so the screen can match the time of day. If you allow it, your location is used only on your device to calculate sunrise and sunset, and is never sent to Lento's servers or anyone else. If you choose "Always allow", it's kept on your device for up to 6 hours. If you don't allow it, we use Seoul's times.

• We use AI for after-reading conversations, story creation, parent letters and classifying worrying signs.
• Classifying worrying signs is used only to decide whether to alert you, never to make decisions that disadvantage your child.
• AI can be wrong. If you receive an alert, talk with your child calmly, and seek professional help if needed.

Send any privacy questions, complaints or requests for redress to the contact above. We'll respond promptly.

• Personal Information Dispute Mediation Committee: 1833-6972, www.kopico.go.kr
• Privacy Infringement Report Center: 118, privacy.kisa.or.kr
• Supreme Prosecutors' Office: 1301, www.spo.go.kr
• Korean National Police Agency: 182, ecrm.police.go.kr

We'll announce changes in the service 7 days before they take effect. For important changes, such as new information collected or new purposes, we'll give 30 days' notice and ask for consent again where needed.