Welcome to CompEx

What is CompEx?

CompEx is a data-driven exam preparation platform for the GRE and GMAT. Unlike traditional question banks with static, recycled problems, CompEx uses artificial intelligence to generate fresh, high-quality questions continuously — and gives you deep analytics to pinpoint exactly where you need to improve.

Think of it as the LeetCode approach to exam prep: habit-forming practice, transparent performance data, and a relentless focus on measurable improvement.

---

What Makes CompEx Different

AI-Powered Question Generation

CompEx doesn't rely on a fixed pool of questions. Our autonomous question generation pipeline — powered by DeepSeek R1, a state-of-the-art reasoning model — creates new problems around the clock across every topic and difficulty level.

Every question goes through a 4-phase chained pipeline: metadata generation, question text creation, answer option construction, and step-by-step solution writing. This ensures each problem is internally consistent, properly calibrated, and comes with a detailed AI-generated explanation.

An automated quality control system continuously evaluates questions and removes any that fall below our quality threshold — replacing them with higher-quality alternatives. The result: your question bank is always growing, always improving, and never stale.

10+ Interactive Analytics Charts

CompEx doesn't just track whether you got a question right or wrong. It gives you a comprehensive analytical dashboard with over 10 interactive D3.js visualizations:

• Activity Heatmap — See your daily practice consistency at a glance, just like a GitHub contribution graph
• Accuracy Trend Chart — Track your accuracy and average speed over time
• Topic Quadrant Analysis — A 4-quadrant scatter plot that classifies every topic into Mastery (fast and accurate), Over-Invested (accurate but slow), Rushed (fast but error-prone), or Critical (slow and inaccurate)
• Skill Radar Chart — Multi-axis visualization of your strengths across all topics
• Difficulty Distribution — Understand what difficulty levels you're spending your time on
• Section Distribution — See how your effort splits across exam sections
• Outcome Time Distribution — Compare time spent on correct vs. incorrect answers against the community

Automated Weakness Detection

You don't have to guess where to focus. CompEx's Actionable Stats engine automatically surfaces three critical insights:

• Priority Areas — Topics where your accuracy is below 65%, sorted by how often you attempt them. These are the areas hurting your score the most.
• Speed Gains — Topics where you're accurate (80%+) but slow (over 120 seconds per question). These are efficiency leaks where a small time improvement yields outsized score gains.
• Strength Zones — Topics where you're consistently at 90%+ accuracy across 5 or more attempts. Maintain these, but don't over-study them.

Gamification That Drives Consistency

Exam prep is a marathon, not a sprint. CompEx keeps you engaged with:

• Daily Streaks — Track consecutive days of practice to build lasting study habits
• XP System — Earn experience points weighted by question difficulty. Level 1 questions earn 10 XP; Level 5 questions earn 500 XP. Every correct answer builds your profile.
• Global Leaderboard — See how you rank against other students preparing for the same exam. Your Global Rating blends practice XP (40%) and mock exam performance (60%) into a single score.
• Collectible Badges — Unlock achievements through challenges and milestones

Full-Length Mock Exams with Post-Exam Analytics

Practice under real exam conditions with timed mock exams:

• GRE Mocks: 1 hour 28 minutes, section-timed with hard deadlines
• GMAT Mocks: 2 hours 15 minutes, matching the GMAT Focus Edition format

After each mock, your Mock Dashboard provides four dedicated charts:

• Box Plot Chart — Your score vs. the community score distribution (quartile visualization)
• Scatter Plot — Your scores across multiple mocks plotted against difficulty
• Percentile Trend — How your percentile rank has changed across mocks over time
• Score Distribution — Community histogram with your score marked

AI Coach Solutions

Every single question comes with an AI-generated step-by-step solution. After you answer, the AI Coach breaks down the problem, walks through the reasoning, and explains why each answer choice is correct or incorrect. No more wondering "why was I wrong?" — every mistake becomes a learning opportunity.

---

How CompEx Works

1. Sign up and choose your exam (GRE or GMAT)
2. Explore questions by topic, question type, or difficulty level
3. Practice at your own pace — the platform tracks every attempt, timing, and outcome
4. Review your analytics dashboard to see exactly where you stand
5. Focus on your Priority Areas and Speed Gains identified by the automated weakness detection
6. Take mock exams to simulate the real test and benchmark against the community
7. Repeat — your question bank keeps growing, and your analytics keep sharpening

---

Ready to Start?

Choose your exam to learn more about its structure and how CompEx helps you prepare:

• GRE — Graduate Record Examination
• GMAT — Graduate Management Admission Test

Or Sign up now to start practicing.