Train your mental math speed daily
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Train your mental math speed daily
PracticeWaiting for opponent...
5 questions · No timer · Quick warmup
10 questions · 15s per question · Train speed
10 questions · 3 min total · Exam pressure
10 questions · Choose a category
Multi-topic session · 1–100 questions · Fully personalized
Practice your previously wrong answers
AI-generated word problems · Choose category & difficulty
Challenge a friend · Same questions · Realtime 1v1
Difficulty is auto-managed based on your performance.
LearnCalculation foundations every student must memorize.
| Fraction | Percentage |
|---|---|
| 1/2 | 50% |
| 1/3 | 33.33% |
| 2/3 | 66.66% |
| 1/4 | 25% |
| 3/4 | 75% |
| 1/5 | 20% |
| 2/5 | 40% |
| 3/5 | 60% |
| 4/5 | 80% |
| 1/6 | 16.66% |
| 5/6 | 83.33% |
| 1/8 | 12.5% |
| 3/8 | 37.5% |
| 5/8 | 62.5% |
| 7/8 | 87.5% |
| 1/9 | 11.11% |
| 2/9 | 22.22% |
| 4/9 | 44.44% |
| 5/9 | 55.55% |
| 7/9 | 77.77% |
| 8/9 | 88.88% |
| 1/10 | 10% |
| 1/11 | 9.09% |
| 2/11 | 18.18% |
| 3/11 | 27.27% |
| 5/11 | 45.45% |
| 9/11 | 81.81% |
| 1/12 | 8.33% |
| 1/15 | 6.66% |
| 1/20 | 5% |
| 1/25 | 4% |
| 1/40 | 2.5% |
| 1/50 | 2% |
| Rule | Trick |
|---|---|
| × 5 | (n × 10) ÷ 2 |
| × 11 | n × 10 + n |
| × 25 | (n × 100) ÷ 4 |
| × 50 | (n × 100) ÷ 2 |
| × 75 | (n × 300) ÷ 4 |
| × 125 | (n × 1000) ÷ 8 |
Formulas, shortcuts & tricks organized by topic.
AnalyticsStart practicing to see category-wise performance.
AI-powered performance analysis.
SettingsInstall QuantReflex on your device for offline use
Switch between light and dark theme
Choose a visual style
Adjusts question complexity
Set your daily question target
Allow skipping questions in drills
Play sound on answers and navigation
Vibrate on correct answers
Reduce animations for accessibility
Receive daily motivational push reminders
Learn how to use the app
App info and developer
Free Plan
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Everything you need to master competitive aptitude training
QuantReflex is a precision training platform for mental math and quantitative aptitude. Build speed and accuracy through short, focused daily sessions.
Built for:
Here's how to get going in 60 seconds:
💡 Use the Daily Warmup on the Home tab every morning to start your streak and ease into the day.
5 questions, no timer. The fastest way to start sharp — use it every morning to build a daily habit before you dive deeper.
10 questions, 15 seconds each. Builds the muscle memory you need to solve under exam pressure — where every second counts.
10 questions in 3 minutes. The closest simulation of a real QA section — train your pacing so exam day feels familiar.
10 questions, one category. Drill weak topics — Percentages, TSD, Profit & Loss — until they stop costing you marks.
Pick any mix of categories, set count (1–100), and add a timer. Build sessions around your exact syllabus — not a preset someone else designed.
💡 Combine 2–3 weak categories in one session for high-density revision.
Retry every question you got wrong — they stay in your pool until you solve them correctly. The fastest path to recovering marks you're already losing.
💡 Finish every session with a Review Mistakes round. Mistakes not revisited are marks not recovered.
AI-generated contextual word problems across any category and difficulty. These simulate real exam questions that require comprehension + calculation, not just raw speed.
💡 Start with "Easy" word problems to build reading speed, then scale to Hard for full exam simulation.
Challenge a friend to a real-time 1v1 battle with identical questions. Both players solve the same set simultaneously — winner takes the highest accuracy and fastest time. Create a room, share the invite link, and compete live.
💡 Duels are the ultimate test of exam readiness — if you can beat a friend under pressure, you’re ready for the real thing.
💡 Check your weakest category every week. If it's below 60%, run a Focus Training session on it before your next mixed drill.
Train faster. Improve accuracy. Build consistency.
Personalized guidance. Smarter practice. Faster improvement.
QuantReflex is a Progressive Web App: install it from your browser and use it offline.
Once installed, the app launches full-screen and works offline. Refresh after updates if needed.
💡 Installing gives you a faster, distraction-free training experience.
💡 Consistency beats intensity. A 10-question daily habit beats occasional marathon sessions every time.
Yes! The core experience (Quick Drill, Reflex Drill, Timed Test, Focus Training, Learn tab, Analytics) is completely free with a daily question limit. Premium unlocks unlimited questions and advanced features.
Yes. Install the app from your browser and all practice modes work offline. AI features and Duels require an internet connection.
Your progress, settings, and statistics sync securely via Firebase across all devices where you're logged in.
Premium (₹89 lifetime) unlocks training features. Premium+ adds AI-powered features like mistake explainers, AI coaching, study plans, and word problems.
Yes. Enter your coaching institute’s unique ID during signup to connect your progress with your institute's dashboard.
India's precision training platform for competitive quantitative aptitude
QuantReflex is a performance-first quantitative aptitude training ecosystem built for serious exam preparation. It combines speed drills, adaptive learning, AI-powered coaching, competitive 1v1 duels, and precision analytics — so you build both speed and accuracy with measurable, trackable consistency.
Unlike passive study apps, QuantReflex is action-first: every session is deliberate practice that directly mirrors exam conditions. Whether you're solving against the clock, competing against a friend, or reviewing your weakest categories with AI guidance — every tap moves you closer to your target score.
Premium (₹89 lifetime) unlocks custom training, mistake review, hard mode, adaptive practice, advanced themes, performance insights, and unlimited daily questions.
Premium+ (AI Layer) adds AI-powered features: mistake explainer with step-by-step reasoning, personalized AI coach insights, study plan generator, and unlimited AI word problems.
Version 2.0.0
Major release. Premium branding, redesigned share cards, AI coaching, Math Duel system, adaptive training, and comprehensive analytics — all live.
Free Plan
QuantReflex is actively developed and continuously improving. Areas being explored:
💡 Quality is always prioritized over speed — every feature ships when it's ready.
QuantReflex was built with a single conviction: speed in quantitative reasoning isn't talent — it's trained reflex. This platform exists to make that training structured, measurable, and accessible to every serious exam aspirant.
For feedback, suggestions, or support, reach out at:
"From practice to percentile — one session at a time."
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