Privacy Policy for KD Line

Last updated: 26 October 2026

This is the privacy policy for the Android app KD Line (package name com.sangwan.audioMuteLine.audio), published on Google Play. It explains how we access, collect, use, share, retain, and delete user and device data.

Developer / privacy contact: sangwan34212@gmail.com
Phone: +91 79732 82002

KD Line is a private, invitation-only push-to-talk audio line for a host and invited users. It is not a public social network, marketplace, or advertising product. We do not sell personal or sensitive user data.

By creating an account, logging in, or using KD Line, you agree to this Privacy Policy and the Terms of Use.

Who this applies to

This policy applies to people who install KD Line from Google Play, then log in as a host or as a user. Hosts are created by the operator in Firebase. Users are created by a host inside the app.

Information we collect

Account details: user name, password, channel name, host or user role (isHost), and whether the account is active.
Session details: last login time, a session id, and a device identifier (Android ANDROID_ID) so a user account can be limited to one signed-in device at a time. Hosts may replace a previous session when they log in on another device.
Microphone audio: live speech only while you hold the talk button in a meeting. Audio is sent between devices in that meeting. We do not record or transmit microphone audio in the background when you are not in a meeting, and we do not record when the talk button is not held.
Voice recordings: speech during a meeting may be saved as audio files on the phone. Files are named by speaker. They stay on that device unless the user plays, shares, or deletes them in the app.
Network data: internet is used for login, meeting signaling, and live audio. WebRTC may send technical connection data (such as IP address) to STUN servers so the call can connect.

We do not collect contacts, location, SMS, call logs, photos, installed-app lists, advertising IDs, payment information, or Gmail/Google account credentials. A Google account is needed only if you install from Google Play, not to log in to KD Line.

Permissions

Microphone — used only for hold-to-talk speech in a meeting. Android asks for this permission before you join.
Internet / network state — login, signaling, and live audio.
Modify audio settings / wake lock — speaker vs earpiece routing and keeping the meeting awake while you are in a call.

How we use this information

To authenticate hosts and users and keep access until the host expiry date.
To connect people in a private channel and carry live talk audio.
To let a host accept or decline join requests, remove a participant, create users, and turn accounts on or off.
To limit a user login to one device while that user is signed in.
To store optional meeting recordings on the phone so they can be replayed or deleted.

We do not use this data for advertising, analytics marketing, or profiling.

Where data is stored and who it is shared with

Google Firebase (Firestore) stores account and session information. Firebase is operated by Google. Data may be processed on Google Cloud servers in the region configured for the Firebase project.
On the phone we store a local login session and audio recording files.
Live audio (WebRTC) is sent between phones in the meeting. It is not posted publicly. Connection setup may use public STUN services (for example Google and Cloudflare) so devices can find a network path. Those services can see technical network data, not your account password.
The host who created a user can see that user’s account name, password they created, activity, and last login. People in a meeting can hear live speech. Recordings on a phone can be played, deleted, or shared by that phone’s user through the Android share sheet. That share is user-initiated and is not a sale of data.

We do not sell personal or sensitive user data. We do not share it with advertisers. We may disclose data if required by law or a valid government request.

Security

Login and Firebase traffic use HTTPS. Keep your password private. Do not share your login. Hosts should create accounts only for people they trust. We limit data to what the app needs to run the private audio line.

Retention

Account records stay in Firebase until the account is deleted after a valid request, or until the operator/host removes them.
Disabling an account (isActive: false) blocks login. That is not the same as deletion.
Local recordings stay on the phone until you delete them in the app or uninstall the app.
The local login session is removed when you log out.

Account and data deletion

KD Line accounts can be deleted. Freezing or disabling an account is not a substitute for deletion. When we delete an account, we delete the associated account record in Firebase (name, password, session, device id, role, and host link). Recordings that exist only on a phone must be deleted on that phone in the Recordings screen, or by uninstalling the app.

In the app: open Privacy policy / Delete account from the login or home screen, or email sangwan34212@gmail.com with subject “Delete my KD Line account” and your user name.

On the web: email the same address or use this page. We complete deletion requests within 30 days.

You can also log out, change your password, delete recordings on the phone, and ask a host to disable your login immediately while deletion is processed.

Children

KD Line is not directed at children and is not a Designed for Families app. You must be at least 13 years old, or the age of digital consent in your country, whichever is higher. We do not knowingly collect personal information from children under 13. If you believe we have, email sangwan34212@gmail.com and we will delete it.

Your choices and rights

Log out at any time.
Change your password in the app.
Delete recordings stored on your phone.
Refuse microphone permission (you will not be able to talk in a meeting).
Request access, correction, or deletion of your account by emailing the privacy contact.

Third-party code (SDKs)

KD Line uses Google Firebase / Firestore for accounts and meeting signaling, and WebRTC for live audio. We are responsible for how this code handles data from the app. These SDKs are used only to run login and private meetings, not to sell data or show ads.

International users

If you use the app from another country, your information may be processed in the Google Cloud region configured for the Firebase project, which may be outside your country, including India.

Changes

If this policy changes, we will update the date at the top of this page. Continued use of the app after an update means you accept the revised policy.

Contact

Privacy and deletion requests: sangwan34212@gmail.com
Phone: +91 79732 82002

Terms of Use and user-generated content

KD Line carries live speech and optional recordings created by users (user-generated content) inside a closed, invite-only channel. It is not a public feed.

Use the app only for lawful, work or group communication that the host invited you to join.
Do not share illegal content, child sexual abuse material, hate, harassment, threats, or others’ private information.
Do not record or share meeting audio without a lawful reason and the host’s rules.
The host admits people, can remove a person from a meeting, and can disable an account.
To report objectionable speech, a user, or a recording, email sangwan34212@gmail.com with the channel name, user name, and what happened. We review reports and may disable or delete accounts.
Hosts should only invite people they can identify (for example a team or known group).

Logging in means you accept these Terms of Use. We may disable or delete accounts that break them.