Privacy policy

Last updated: 1 November 2026

ChatterSyn is a desktop app that runs on your computer. It has no user accounts of its own, and it sends no analytics, telemetry or advertising data. Its only server is a sign-in relay for Google, described below, which stores nothing. The developer of ChatterSyn never receives your data.

YouTube API Services

ChatterSyn uses YouTube API Services to read and send YouTube live chat messages and to moderate live chats. By using ChatterSyn's YouTube features you also agree to the YouTube Terms of Service, and Google's handling of your data is covered by the Google Privacy Policy.

ChatterSyn's use and transfer of information received from Google APIs adheres to the Google API Services User Data Policy, including the Limited Use requirements.

What ChatterSyn accesses, and why

• Your Twitch and Google sign-in. When you connect an account in Settings → Accounts, ChatterSyn receives sign-in tokens so it can act for you: read chat, send the messages you type, and carry out the moderation actions you choose (for example bans, timeouts and deleting messages).
• Your channel and streams. Your Twitch and YouTube channel name and ID, whether you're live, your current live stream and its viewer count, so the Stream tab can follow your own stream.
• Live chat. The messages, display names, badges and emotes of the chats you open, so ChatterSyn can show them. YouTube display names are looked up through YouTube API Services and kept in memory until you quit.
• Images. Emotes, badges and profile pictures, downloaded from Twitch, YouTube, 7TV, BetterTTV and FrankerFaceZ to draw the chat.

ChatterSyn uses this information only to provide these features to you. It does not use it for advertising, does not sell it, and does not share it with anyone. The only services it sends anything to are the platforms that provide the features (Twitch, Google/YouTube and the emote services above, each covered by its own privacy policy) and, for Google sign-in, ChatterSyn's sign-in relay. Like any app on the internet, those services see your IP address when ChatterSyn talks to them.

The Google sign-in relay

When you connect YouTube through ChatterSyn's built-in Google app, two steps go through ChatterSyn's sign-in relay at chattersyn.redcyberdragon.net: exchanging Google's one-time sign-in code for your tokens, and renewing those tokens later. The relay adds ChatterSyn's app credential, which Google asks developers not to publish inside the app, and passes the request straight to Google. It does not store or log your tokens or anything else, and it takes no part in anything else the app does. If you use your own Google app (Settings → Accounts → YouTube: advanced), the relay isn't used.

What ChatterSyn stores on your computer

• Sign-in tokens are kept in your system's credential store: the macOS Keychain, Windows Credential Manager, or the Secret Service on Linux (GNOME Keyring or KWallet). If no credential store is available, ChatterSyn tells you and keeps them in a file in its settings folder that only your user account can read.
• Chat logs. ChatterSyn saves the chats you open to text files, one file per channel per day, so you can look back at them. Turn this off in Settings → General. Logs of YouTube chats are deleted automatically after 30 days.
• An image cache of emotes, badges and profile pictures, so chats load faster next time. Images older than 30 days are removed, and the cache never grows past 256 MB.
• Your settings, open tabs and window size.
• A diagnostic log of technical events, with sign-in tokens and keys removed, for troubleshooting. It never leaves your computer unless you choose to share it (Settings → About → Open Diagnostic Log Folder).

Removing your data and revoking access

• Settings → Accounts → Disconnect deletes that account's sign-in tokens from your computer.
• You can revoke ChatterSyn's access at any time in your Google Account security settings or your Twitch connections.
• To remove everything else, delete ChatterSyn's folders: on macOS, the ChatterSyn folders in ~/Library/Application Support, ~/Library/Preferences and ~/Library/Caches; on Windows, %LOCALAPPDATA%\ChatterSyn; on Linux, the ChatterSyn folders in ~/.config, ~/.local/share and ~/.cache (for the Flatpak, ~/.var/app/net.redcyberdragon.ChatterSyn).

Children

ChatterSyn is not directed at children under 13. Twitch's and YouTube's own age requirements apply to their accounts.

Changes

If this policy changes, the new version is posted on this page with a new date.

Contact

Questions about privacy: open an issue on GitHub.