Cloken is a Chrome extension that estimates how much of Claude's context window your current conversation is using. It reads your conversation from the claude.ai page in your browser to count tokens. That reading happens entirely on your device.
This is an architectural commitment, not a policy preference. The extension has no mechanism to send message content anywhere.
Anonymous usage telemetry. When you use the extension, it sends small event records to a private database. These records contain:
| Field | What it is |
|---|---|
| install_id | A randomly generated UUID created when you first install the extension. Stored locally on your device. Not linked to your name, account, or any other identifier. |
| event_type | A label for what happened — for example: "context meter entered orange zone" or "warning modal dismissed." |
| extension_version | The version of Cloken you have installed. |
| timestamp | When the event occurred. |
That is the complete list. Events do not contain your name, your email, your IP address, your conversation content, the URL of your conversation, or any string derived from anything you wrote.
Your email address is also transmitted — if and only if you choose to enter it in the optional signup form. This is never required to use the extension.
Telemetry is used to understand how the extension is being used — which warning zones users reach, whether the modal is being dismissed or engaged with, and whether the extension is working correctly. It is not sold, shared with third parties, or used for advertising.
Raw telemetry records are retained for 90 days, after which they are deleted or aggregated into counts with no per-install detail.
If you submit your email, it is stored in a private database and used only to send you announcements about Cloken — specifically, updates about the memory feature the signup form describes. Your email will not be shared with any third party, will not be added to any other list, and will not be used for any other purpose.
You can request deletion at any time. See the contact section below.
Telemetry and email data are stored in Supabase, a managed database platform. No conversation content is stored there or anywhere else outside your browser.
Local extension data — your HUD position, session state, and install ID — is stored in your browser via chrome.storage.local. It does not leave your device.
If you have claude.ai open in more than one tab, each tab operates independently. There is no cross-tab tracking or synchronization.
Cloken is not directed at children under 13 and does not knowingly collect data from them.
If this policy changes in a way that affects what data is collected or how it is used, the "last updated" date at the top will reflect that. Continued use of the extension after a policy update constitutes acceptance of the updated terms.
To request deletion of your telemetry data or email address, contact: mtsdevstudio@gmail.com