Claude Fable 5 Limit & Usage Tracker | Burn-Rate ETA

Other trackers tell you "you've used 63%." LimitLens tells you what that actually means:

⏰ "At this pace, cap hits ~4:42 PM" 📈 Your live burn rate in %/hour (turns red when you're going too fast) 🔄 Exact countdown to your next session and weekly reset

It samples your usage over time and does the math for you — so you can decide whether to push on or take a break.

⏱️ LIVE SESSION GAUGE

A beautiful instrument-style dial with tick marks and a moving needle shows your 5-hour session at a glance. The arc fills smoothly and shifts color as you approach your limit:

🟢 Green — cruise mode 🟡 Yellow — halfway there 🟠 Orange — slow down 🔴 Red — danger zone

📊 7-DAY LIMITS, PER MODEL

Track your weekly cap across All models, with a highlighted bar for Anthropic's newest flagship model so you always know how much of it you have left this week. Each model gets its own animated usage bar.

⚡ PEAK-HOUR ADVISOR

Peak hours drain your session several times faster. LimitLens shows a live peak/off-peak banner with a ticking countdown to the next change — so you can shift heavy work to off-peak windows and get more out of every session. 🕐

🔔 SMART ALERTS (OFF BY DEFAULT)

Optional browser notifications at 75%, 90% and 100% of your session. No nagging — they're off until you turn them on, and you can switch them off anytime with one click.

🗓️ ACTIVITY HEATMAP

A GitHub-style grid shows when you actually use Claude — hour by hour across the week, or day by day across the month. Spot your patterns. Plan around peak. Work smarter. 📅

👀 ALWAYS-ON TOOLBAR ICON

Two concentric rings live on the icon itself: ⭕ Outer ring — your 5-hour session ⭕ Inner ring — your 7-day weekly limit Plus a live percentage badge, color-coded from green to red. You don't even need to open the popup.

🎨 LIGHT & DARK MODE

Auto-follows your OS, or pick light/dark manually. Your choice is saved and applied instantly.

🔒 PRIVACY FIRST — YOUR DATA STAYS YOURS

✅ Everything is stored on your device (chrome.storage.local) ✅ The ONLY network calls go to claude.ai — reading your own usage through your existing login session ✅ No password ever stored, no account, no sign-up ✅ No analytics, no tracking SDKs, no fingerprinting, no external servers ✅ Open the code and verify it yourself — nothing is hidden

✅ REQUIREMENTS

• An active Claude AI account
• Logged into claude.ai in your browser

That's it. Pin the icon and you're set. 📌

⚠️ DISCLAIMER

LimitLens is an independent, community-built tool. It is not affiliated with, endorsed by, or sponsored by Anthropic. "Claude" is a trademark of Anthropic, used here only to describe compatibility. Usage data is read from your own account via claude.ai's web interface; if Anthropic changes their interface, tracking may temporarily pause until the extension is updated.

💬 FEEDBACK

Found a bug? Want a feature? Leave a review or reach out — LimitLens is built for the community and shaped by it. ❤️