Privacy Policy

Gauge is a Chrome extension that shows your Claude plan usage on the browser toolbar. I built it to save myself a trip into the Claude settings page every time I wanted to check how much of my limit was left. This page explains what it does with data, which is very little.

The short version: Gauge has no server, runs no analytics, and sends nothing anywhere. Everything it reads stays on your own computer.

What Gauge reads

To show your usage, Gauge asks claude.ai for two things:

• Your account identifier, so it knows which usage to fetch.
• Your plan usage figures: the session and weekly percentages and the times they reset.

These are the same requests your browser already makes when you open Claude and go to Settings, then Usage. Gauge reads the usage percentages and reset times, and nothing else. It never sees your conversations, your prompts, your projects, or any files in your account.

How it signs in

Gauge does not handle your login. It has no permission to read your cookies and cannot see your password or session key. When it asks claude.ai for your usage, Chrome attaches your existing Claude session automatically, the same way it does for any site you are already logged in to. If you are not signed in to claude.ai, Gauge simply shows a message asking you to sign in.

What gets stored, and where

Gauge keeps a few things in Chrome's local storage, on your machine only:

• Your most recent usage figures and reset times.
• A history of past readings, kept for up to 90 days, so it can draw the trend line and estimate when you will hit your cap. The older the data, the less detail is kept, so the whole thing stays small, usually well under 100 KB.
• Your settings, such as which figure the badge shows and your notification thresholds.
• Your account identifier, saved so it does not have to be looked up every time.

None of this is ever uploaded. It does not sync between your devices. You can see how much history is stored and delete it at any time from the extension's settings page, and uninstalling Gauge removes all of it.

What Gauge does not collect

• No personal information.
• No conversation, prompt, or file content.
• No browsing history or web activity.
• No analytics, telemetry, or crash reporting.
• No advertising identifiers.

Permissions

Gauge asks for only what it needs to do its job:

• Access to claude.ai, to fetch your usage figures from that site.
• Storage, to keep your settings and usage history on your computer.
• Alarms, to refresh the figure in the background so the badge stays current.
• Notifications, to alert you when you cross a threshold you set.

It does not ask for the cookies permission, the tabs permission, or access to any site other than claude.ai.

Third parties

There are none. No data is shared with anyone, because no data ever leaves your computer.

A note on Anthropic

Gauge is an independent extension. It is not made by, affiliated with, or endorsed by Anthropic. Claude is a trademark of Anthropic, PBC. Gauge relies on a claude.ai endpoint that is not publicly documented and could change at any time, which would stop it from working until updated.

Changes to this policy

If this policy changes in a meaningful way, the date at the top will be updated and the change noted in the extension's release notes.

Contact

Questions are welcome at [email protected].