Cognitive fitness for AI users

Use AI.
Don't outsource your brain.

PreThink AI tracks how you use ChatGPT, Claude, Gemini, and Perplexity — then helps you think first, detect loops, and close sessions with clarity. Patterns, not prompts.

Add to Chrome See how it works
PreThink AI
0 AI Load
Focused

Light, steady use — good pacing right now.

2.4hActive time
78Efficiency
12Sessions

Your brain on AI

Other tools count hours. PreThink AI reads patterns.

Other tools

"You spent 4h on ChatGPT."

PreThink AI

"You spent 1h 43m in repetitive exploration loops across 3 AI tools."

Measure → Understand → Intervene → Improve

A calm layer between you and your AI tools.

AI Load Meter

Real-time cognitive load score based on session intensity, context switching, and loop patterns — not just hours spent.

Think First

Before you ask AI, write your own take. Turn AI into a critic instead of your first thinker.

Loop Detection

Detect when you're prompt → answer → prompt → answer for 20+ minutes with no natural stopping point.

Close the Loop

End sessions with decisions, learnings, and one next action — not 17 pages of information and no idea what to do.

See it in action

From gentle nudge to full cognitive report — designed to stay out of your way.

Extension popup
42
Focused
Think-first nudge
Quick pause

What's your guess before asking AI?

Weekly report
COGNITIVE EFFICIENCY
78
2.4h

Not another AI blocker

Freedom blocks access. TokenBar tracks cost. PreThink AI improves how you think with AI.

Tracks AI Cognitive load Loop detection Cross-platform Intervenes
AIUsage / TokenBar ✓ — — ✓ —
Freedom ~ — — — ✓ blocks
ChatGPT / Claude own app — ~ — ~
PreThink AI ✓ ✓ ✓ ✓ ✓
AIUsage / TokenBar
Tracks AI
✓
Cognitive load
—
Loop detection
—
Cross-platform
✓
Intervenes
—
Freedom
Tracks AI
~
Cognitive load
—
Loop detection
—
Cross-platform
—
Intervenes
✓ blocks
ChatGPT / Claude
Tracks AI
own app
Cognitive load
—
Loop detection
~
Cross-platform
—
Intervenes
~
PreThink AI
Tracks AI
✓
Cognitive load
✓
Loop detection
✓
Cross-platform
✓
Intervenes
✓

Privacy by design

We track patterns, not prompts. Usage metadata (which tool, session time, prompt count, switches) stays on your device. Prompt text is never stored. Read the policy.

What is AI Load?

Not screen time. Not a medical score. Your real-time AI intensity.

AI Load
Focused 0–39

How intensely you're using AI right now — rapid prompts, tool-switching, looping.

Cognitive Efficiency
Weekly 0–100

How well you use AI — think-first habits, fewer loops, clearer session endings.

Active AI Time
Not idle tabs

Focused minutes only. Pauses when you switch away. Not hours with ChatGPT open overnight.

Get PreThink

The extension is live. Install it from the Chrome Web Store — no waitlist required.

Add to Chrome

Available on the Chrome Web Store

Want product updates?

Leave your email for new features and tips. Optional — install works either way.

Local on your machine. Patterns, not prompts.