Standard Plan (Free)
Core AI trap diagnostics with a generous free allowance.
- Scan, auto-crop, and mark questions with 2-tap rings
- Trap classification, solution & anti-trap tactic per question
- Supported by a single non-intrusive banner strip
AI Exam Distractor & Trap Engine for Teachers & Students
Never Be Trapped!
Every wrong answer hides a deliberate trap—a buried constraint, a tempting distractor, or a split-second cognitive slip. UNTRAP scans exam pages, decodes why a student fell for the wrong choice, and equips teachers and learners with the exact tactic to beat it.
Free to start on Google Play · Designed for Classroom Educators, Tutors & Exam Prep
2 TapsYellow = Chosen · Red = Correct · Green = Untrapped
14+ TrapsWriter Distractors & Cognitive Slip Categories
100% PrivateZero AI Model Training on Student or Teacher Scans
1. Page Scan & Auto-Crop
2·10² + 8·10¹ + 1·10⁰ + 2·10⁻¹ + 4·10⁻² kg = ?
2. Ring Detection (B → D)
A) 2.8124·10⁻²
D) 2.8124·10²
3. Distractor Diagnosed: Flipped Exponent
Order-of-Magnitude Anchor: 200 + 80 + 1 = 281 kg (hundreds place), so the power of 10 must be positive (+2) before checking decimals.
Interactive Simulation
Experience the Two-Tap Ring System
Switch between Student Mode and Teacher Classroom View. Tap the option chosen on the test, then tap the correct key.
Live Practice Item #4 · Scientific Notation
A farm harvests 2·10² + 8·10¹ + 1·10⁰ + 2·10⁻¹ + 4·10⁻² kg of apples. Which expression shows this total in scientific notation?
1st Tap: Select the option chosen on the paper (Yellow Ring). 2nd Tap: Now select the correct answer key (D) (Red Ring). In this question, the answer key is D. Tap D to place the Red Ring. Trap Decoded! Toggle Teacher View or tap Reset to test another option.
Writer Trap Detected: The Option A Sign-Flip Mine
Option A preserves every mantissa digit (2.8124) accurately and flips only the exponent sign from +2 to −2. Rushed students stop verifying once the decimal digits match.
Writer Trap Detected: Digit Transposition & Place-Value Mirage
Options B and C permute internal digits (.8142) or shift the decimal by one power of ten. Under exam stress, familiar digit clusters bypass working-memory checks.
Untrapped! Full Conceptual Mastery
Both rings merged into Green. UNTRAP logs solve speed and verifies the student avoided the Option A sign-flip distractor.
Counter-Tactic: Order-of-Magnitude Anchor: 200 + 80 + 1 = 281 kg (hundreds place), so the power of 10 must be positive (+2) before checking decimals.
Teacher Classroom Briefing
68% of wrong answers on this item cluster on Option A (Sign-Flip Distractor) rather than place-value addition errors. Spend 90 seconds in class teaching magnitude estimation before decimal alignment.
Real diagnostic output from UNTRAP's pedagogical AI engine.
Why Teachers Choose UNTRAP
Stop re-teaching the whole problem. Teach the exact trap.
When 25 students take a practice test, traditional grading only tells you who missed Question 7. UNTRAP tells you why they picked Option B—and gives you an instant classroom intervention.
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Instant Distractor Breakdown
Scan a student's booklet or a tricky worksheet question. UNTRAP separates calculation slips from deliberate question-writer traps.
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Actionable Classroom Debriefs
Walk into class knowing whether students fell for a 'Hidden Constraint', 'Visual Distortion', or 'Last Confirmation Point' error.
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Safe & Privacy-First for Educators
Cropped question scans stay private to your account. Never shared publicly, never sold, and never used to train AI models.
Two Taps. Three Rings. Zero Typing.
Grading or reviewing a 40-question booklet takes seconds. No complex menus or manual text entry.
1st Tap: Yellow Ring
Marks the selected answer on the scanned question.
2nd Tap: Red Ring
Marks the official answer key so the AI targets the exact distractor gap.
Merged: Green Ring
Tap the same option twice? Yellow and Red fuse into Green—confirming mastery.
The Pedagogical Shift
Answer keys explain how to solve. UNTRAP explains why you missed.
Test writers engineer wrong options using cognitive psychology. Watching a standard solution video shows the algebra, but leaves the mental blind spot untouched. Naming the trap immunizes the student against it forever.
The 4T Pedagogical Loop
Detect. Diagnose. Treat. Track.
Every mistake becomes structured cognitive telemetry for students and educators.
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01
Detect
Snap the exam page with your camera. Vision AI deskews the sheet, slices out each question, and extracts math, diagrams, and handwritten scratch notes.
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02
Diagnose
UNTRAP compares the Yellow Ring against the Red Ring, identifying the writer's distractor archetype and the student's exact reasoning slip.
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03
Treat
Targeted micro-drills and memorable heuristics designed specifically to neutralize the diagnosed trap category.
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04
Track
Longitudinal radar charts showing which cognitive traps are shrinking across weeks of exam prep.
Inside Every AI Diagnostic Report
8 Pedagogical Layers Per Question
- Exact Question-Writer Trap archetype & severity rating
- Whether the student fell for the primary distractor and why
- Step-by-step reconstruction of the student's thought path
- Item difficulty index & benchmark solve time
- Personal time-spent comparison (when logged)
- Handwriting & margin scratch-work inspection
- Clean digital transcription + full worked solution
- Reusable anti-trap rule for teachers & students
Simple & Transparent Access
Start Free on Google Play. Upgrade for Deep Analytics.
Built to be accessible for individual learners, tutors, and classroom teachers.
UNTRAP Deep Analysis (Pro)
Ad-free experience with multi-exam pattern tracking for serious prep and teachers.
- Cross-exam cognitive radar & recurring error heatmaps
- Pacing, fatigue & attention-drop telemetry across full booklets
- 100% ad-free with priority AI vision processing & exportable summaries
Your next exam booklet is full of traps.
Turn every wrong answer into a breakthrough.