Six systems, one goal: success on exam day

Most platforms serve random questions from a static bank. You either know the answer or you don't - and you learn nothing about your actual ability level. Xamio uses Item Response Theory, the same psychometric framework behind the GRE and GMAT. After every answer, our 2PL model recalculates your ability estimate (theta) and picks the next question at exactly the right difficulty. Not too hard, not too easy.

• Real-time theta estimation using the 2PL logistic model
• Questions spanning the full difficulty range (-3 to +3 theta)
• Section-level adaptive difficulty in mock exams - the exam evolves as you do
• Confidence-scored results - know how reliable your score is

Cramming vocabulary is inefficient. Your brain needs to see a word at specific intervals - just before you'd forget it - to lock it into long-term memory. Xamio implements SM-2, the same algorithm behind SuperMemo and Anki. Every word gets its own ease factor and review schedule based on how well you know it. Rate it "Easy" and you'll see it in weeks. Rate it "Again" and it's back tomorrow. The system learns your memory as precisely as it learns your ability.

• 3,600+ high-frequency AMIRNET words across 10 thematic domains
• Individual ease factors with dynamically growing intervals
• Four quality ratings (Again, Hard, Good, Easy) that adjust each schedule
• Due-word queue sorted by urgency - review what you're closest to forgetting

Static question banks run out. Students end up memorising answers instead of learning patterns. Xamio generates fresh questions on demand using large language models, calibrated to your ability level via IRT. All six AMIRNET formats are covered: Sentence Completion, Restatement, Reading Comprehension, Grammar in Context, Word Formation, and Essay. Every question includes a step-by-step explanation - so you understand why you were wrong, not just that you were wrong.

• Powered by Nemotron by NVIDIA, purpose-tuned for academic English
• Write-through caching to the question database after first use
• Pre-generation masks latency - sections generate while you work on the previous one
• Exposure tracking prevents repeats within your study window

Mock exams on Xamio aren't just question sets. They're full adaptive simulations that mirror the real AMIRNET: 6 scored sections (Sentence Completion, Restatement, Reading Comprehension) plus 1-2 experimental sections. Each section is timed, and difficulty adapts section-to-section based on your cumulative performance. Experimental sections add bonus points with no penalty - pure upside.

• 8 sections, 32 scored questions with strict time limits
• Experimental sections with bonus scoring - no penalty, pure upside
• Section-level adaptive difficulty - section 1 performance shapes section 2
• Instant scoring with confidence intervals and full section breakdowns

Most students don't know where to focus. Should they drill more Sentence Completion or Restatement? Xamio removes the guesswork. After every session, the system analyses your accuracy across every question type and domain, identifies consistent weakness patterns, and surfaces them on your dashboard. One tap starts a focus session pulling from your previously incorrect questions - targeting exactly what needs work.

• Cross-session pattern detection - not just one bad day
• Fresh material within each weak area via exposure tracking
• Focus sessions pull from real missed questions, not generic fillers
• Dashboard visibility keeps weak areas front and center

Raw practice volume doesn't tell you much. Were today's questions harder than yesterday's? Are you actually improving or just getting used to the platform? Xamio's analytics break down performance at every level: by question type, difficulty, domain, and over time. Your dashboard shows streak data, accuracy trends, weak areas, and due-word counts - everything you need to decide what to study next.

• Per-type and per-difficulty accuracy tracking with visual trend charts
• Streak monitoring - consecutive study days, not just raw session counts
• Score projection based on IRT theta - estimated AMIRNET score range
• Exam history with score trends, period filtering, and full review