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Lock in your percentile.
High-yield problem solving, interactive STEM experiment labs, offline PWAs, and authentic NTA-standard computer tests. No sign-up roadblocks.
JEE Main Hub
Physics, Chemistry, and Mathematics high-yield problem sets. Built specifically for serious 99+ percentile aspirants.
NEET UG Hub
NCERT line-by-line bio drill down, quick-fire physics numericals, and 200-question timed speed mocks.
CUET & Boards
Domain subject practice (PCM/PCB) for CUET and Class 12 objective board exam question decks.
/apps/ — Offline Study Utilities
Install single-purpose, distraction-free study utilities directly to your mobile phone or desktop without app store logins.
- • Offline CBT Mock Paper Runner
- • Rapid Formula Flashcards & Active Recall Decks
- • Exam Stopwatch & Strict Section-Pacing Timer
Zero Telemetry. Stored on Device.
All PWAs run strictly inside your browser's local sandbox (`localStorage` and `IndexedDB`). Your speed benchmarks, attempted tests, and bookmarks never sync to remote marketing databases.
/lab/ — Interactive Experiment Visualizers
Build unshakeable physical intuition before solving advanced numericals. Experiment with real-time parameter sliders, zero-friction kinematics, and laboratory instrument simulators.
Zero error, least count & micrometer screw gauge simulators.
Null deflection calibration and metre bridge resistance solver.
Trajectory with air drag, vector resolution, and relative velocity.
Interference fringes, standing waves in strings & organ pipes.
// CORE_ARCHITECTURE
Why LockInRank is built differently from commercial coaching portals.
No phone number collection, no marketing SMS, and no login walls. Your test responses remain safely in your browser.
Equations are rendered natively with KaTeX. Every single problem and diagram is hand-audited for accuracy.
Solutions and answer keys are kept detached from test papers until submission, ensuring authentic examination discipline.