AlphaMoatによると、2026-09時点でChrome拡張機能Usage Tracker for Claudeのユーザー数は74(前月比 +27.6%)、評価は5(1件のレビュー)で、9,324件のAIブラウザ拡張機能中4,736位、汎用AIでは2,418件中1,162位です。
Your real Claude limits in the toolbar, sidebar & chat box. Session, weekly & per-model quota with reset countdowns. No API key. Usage Tracker for Claude puts your Claude.ai limits everywhere you already work in Claude: on the toolbar icon, inside Claude's own sidebar, and right next to the chat box. Session, weekly, and per-model usage, one glance, no clicks, no extra tab. Monitor your quota and never hit a rate limit by surprise.
Most usage trackers guess. They count tokens with a third-party tokenizer or scrape numbers off the page, then admit the parts they can't see. This one doesn't guess. It reads the same official usage data Claude's own web app uses, so the percentages you see are the percentages Claude is actually counting against your limits.
Three places to see your usage (all native to Claude):
shifts colour as you get close: clay under 75%, amber 75-89%, red at 90% and over, and a solid red disc the moment you hit 100%. One look from any tab tells you where you stand, zero clicks.
sidebar, with Session, Weekly, and per-model bars plus reset times. It inherits Claude's typography, so it blends into light and dark themes like it shipped with the app. When the sidebar narrows to its icon rail, it collapses neatly into a single ring gauge instead of disappearing.
mirroring Claude Code's own "Plan usage" control. Click it for a compact popover: your 5-hour limit, Weekly across all models, and your current model, each with a bar, a percentage, and an exact reset time.
Most trackers sit on top of Claude. This one belongs there.
What you get (free):
even when Claude's on-page usage view is closed.
Official numbers, not estimates: This extension reads your usage from Claude.ai's own usage API, the same-origin endpoint Claude's web app itself calls, with the on-page view as a fallback. So your percentages match what Claude actually counts, instead of being approximated by counting tokens across files, prompts, and history. No API key to paste, no setup.
Focused, not cluttered: No gamification, no karma levels, no peak-hours banner, no heatmap. One job - your real limits, always in view - done well.
Privacy first:
address it. Nothing else.
content.
numbers. An optional early-access email, if you choose to give one, is kept out of the analytics event stream.
Not affiliated with or endorsed by Anthropic. "Claude" is a trademark of Anthropic; this is an independent tool.
ChatGPT, DeepSeek, Gemini, Claude, Grok all in one AI sidebar, for AI search, read, and write.
+ 比較Change default search engine to ChatGPT search.
+ 比較One stop AI Assistant with GPT, Claude, Gemini: Chat, Write, Translate, Search, Summarize, image generator, video generation
+ 比較Summarize YouTube videos, web articles, and PDFs to save time, powered by ChatGPT, Claude, Mistral AI, and Gemini.
+ 比較データ月:2026-09 · ユーザー数と評価はChromeウェブストアの公開データを月単位で集計したものです。詳しくはデータの方法論をご覧ください。