NyanCast Privacy Policy

NyanCast shares the screen, camera or audio you select with another person. Our servers do not store shared video or audio, but temporarily store information needed to connect or reconnect. We cannot prevent recipients from recording with another application.

This policy explains how KuronekoServer handles information in NyanCast and its signaling service. See our operator information for the address and responsible operator.

1. Rooms and connections

We collect display names, room IDs, joining times, connection status, device identifiers and connection information such as IP addresses to let people join rooms and connect. Information needed for the connection is also sent to the person you share with. Anyone knowing a room ID can check whether that room is in use.

If you set a room password, we use it to check participants and do not store it in its original form. We use this information to connect and reconnect participants, maintain the service and prevent misuse.

2. Reconnection and temporary storage

Room and participant information is stored temporarily for connection and reconnection. We delete it progressively after the room closes or the reconnection waiting period ends. Depending on connection conditions and deletion processing, it may not be deleted immediately when you leave.

3. Video, audio and outputs

When you start sharing, we send the selected screen, camera video, microphone or computer audio to the recipient. Our servers do not relay, record or store shared video or audio.

We cannot prevent recipients from recording or restreaming using other apps or devices. Check who you share with and what you share. If you enable features that connect to another app, video or other content may be passed to that app.

4. Local storage

Your device stores preferences such as language, display name, recent rooms, selected devices and video quality. Room passwords and shared video or audio are not saved with these preferences.

You can delete preferences using the app or your device. Settings from earlier versions may remain on your device or in your browser. Basic preferences such as language may still be saved when remembering recent settings is disabled.

5. External services and operational logs

We use Cloudflare and Google to help establish connections and operate the service, sending connection information such as IP addresses as needed. Shared video and audio are not sent to these connection-assistance services. During update checks and downloads, delivery providers process IP addresses, access times and related information.

Access and error records support reliable operation, abuse prevention and troubleshooting. Inquiry contact details, content and attachments support responses and investigations. We retain these records as needed for their purposes and legal obligations, then delete unnecessary information. Operational records have a different deletion schedule from room information. We do not use the information for advertising tracking or sell personal information.

The following official privacy policies also explain how these external providers handle information themselves. Cloudflare / Google

6. Disclosure, overseas processing and security

Apart from sharing with recipients you choose and necessary service providers, we do not disclose personal information to third parties without consent, except where permitted by law. We give providers only the information needed and supervise them appropriately.

External services may process information outside Japan. We provide information, obtain consent or apply safeguards as required by law. We work to prevent leaks and misuse through encrypted connections, password protection and limiting staff access.

7. Choices and rights

You can stop sharing, leave rooms, change screen/camera/microphone permissions and delete settings. Request disclosure, notification of purposes, third-party provision records, correction, deletion or suspension at support[at]krnk.org (replace [at] with @). We check usage time, room ID, role and other details and respond under applicable law. With no account and short-lived records, establishing identity may be impossible. We explain refusals due to legal holds, disputes or similar reasons.

8. Minors, changes and contact

Minors must obtain legally required guardian consent. Material changes and their application date will be announced, and consent obtained when required. Contact support[at]krnk.org for inquiries and the dedicated channel for vulnerabilities.

Last updated: 2026/10/01