pheebo - AI math checker

About

pheebo - AI Math Expression Checker for Chrome

AI makes mistakes. pheebo guards your back.

Get instant solutions to mathematical expressions while reading ChatGPT or Claude. No subscription required to start.

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WHAT IS PHEEBO?

pheebo is a browser extension that helps you verify AI mathematical solutions 
instantly and catch calculation errors before they cause problems. Whether you're:
  • Checking AI-generated math from ChatGPT or Claude for mistakes
  • Teaching or tutoring others and need to spot errors quickly
  • Working through technical problems that require accuracy

pheebo saves you time by automatically detecting and solving expressions, 
helping you identify errors in real-time.

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TWO MODES FOR YOUR NEEDS

Selection Mode (FREE - No Account Needed)
  • Manually select any mathematical expression
  • Get instant solutions in a tooltip
  • Works on ChatGPT and Claude
  • Detects simple fractions (1/2) and complex expressions
  • Perfect for quick verification and spot-checking

Automatic Mode (PRO - Subscription)
  • Automatic expression detection scans entire pages
  • Automatically highlights math expressions as you read
  • Real-time solutions without clicking anything
  • Advanced recognition: visual fractions, LaTeX formulas, scientific notation
  • Ideal for intensive study sessions and research
  • 7-day free trial after creating an account
  • Subscribe at https://pheebo.app to unlock all Pro features

TIP: Ask ChatGPT or Claude to "show steps" or "show all computations" for better result

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KEY FEATURES

• Detects mathematical expressions from simple math to complex formulas
• Works seamlessly on ChatGPT and Claude AI platforms
• Catches calculation errors and mistakes instantly
• Handles LaTeX notation and scientific expressions
• Expression counter tracks correct/incorrect solutions
• Enterprise-grade security with encrypted data
• Zero ads, zero tracking
• Lightweight and fast performance

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PERFECT FOR

Students - Verify homework solutions and catch errors in AI-generated explanations
Educators - Quickly check student work and spot mistakes in AI responses
Professionals - Validate technical calculations in real-time and prevent costly errors, without disrupting workflow
AI Users - Confirm ChatGPT and Claude outputs instantly, catching calculation mistakes

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HOW TO USE

1. Install pheebo (no signup required for Selection Mode)
2. Selection Mode: Frame any math and click solve
3. Create an account at https://pheebo.app to start your 7-day free trial of Automatic Mode
4. See solutions instantly in tooltips

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SECURITY & PRIVACY

  • AES-GCM encryption for sensitive data
  • No ads, no tracking, no data selling
  • Certificate pinning prevents man-in-the-middle attacks
  • Secure error handling with no information disclosure
  • Complies with Chrome Web Store security requirements

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SUPPORTED EXPRESSIONS

  • Basic math: 2 + 3 = 5, 10 × 5 = 50
  • Fractions: 1/2, 3/4, visual fractions
  • Scientific: 1.5e3, superscripts (2², 3³)
  • Complex: (2 + 3) × 4, √16 + 2³
  • LaTeX: \frac{1}{2}, \sqrt{x}
  • Units: 15 m/s

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START FREE

No credit card required. No account needed for Selection Mode. 

Try Automatic Mode free for 7 days after creating an account and subscribing at https://pheebo.app. A valid payment method is needed for the trial to begin. No payment will be charged in the trial period.

Questions? Visit https://pheebo.app/faq or check our support documentation.