Not just the answer, but the concept behind it. Dual AI verification, personalised explanations, concept graphs, and spaced repetition. Built for serious JEE and NEET aspirants.
Free: 3 questions/day. No credit card needed.
5,000+
PYQs and formulas indexed per explanation
4 subjects
Physics, Chemistry, Maths, Biology
Concept graph
Prerequisite map across all subjects
2x verified
Every answer checked by a second AI
No signup friction, no waiting.
Paste any JEE/NEET question or upload a photo. OCR extracts the text, auto-detects the exam and subject, and sends it through.
JEEnius tells you what skill JEE is testing, walks through every step, flags the most common mistake, and has a second AI independently verify the answer before you see it.
A follow-up question checks you actually got it. Wrong? That concept gets scheduled for spaced review. Your mastery map and concept graph update automatically.
A second AI re-checks every answer, and every explanation comes with the concept behind it.
A second independent AI re-solves every question and compares answers. If they disagree, a stronger model resolves it before you see anything.
Every question you ask updates your weak-concept profile. The next explanation is already personalised to what you're struggling with.
Matrix-match, multi-correct MCQ, assertion-reason, paragraph: each gets a format-specific approach, not a generic prompt. Hard questions activate DeepSeek R1 reasoning.
A feature-by-feature breakdown of what each tool actually offers.
| Feature | JJEEnius | Doubtnut | ChatGPT / Gemini |
|---|---|---|---|
| Instant step-by-step solution (text & image) | |||
| Identifies the core concept being tested | ~ | ||
| Answer verified independently by a second AI | |||
| Handles matrix-match, multi-correct & assertion-reason | |||
| Asks a follow-up to check you actually understood it | |||
| Personalises next explanation to your weak spots | |||
| Concept dependency graph (what to study first) | |||
| Spaced repetition + chapter mastery heatmap | |||
| Links to similar past PYQs |
* Based on publicly available features as of 2025. Partial (~) means limited or manual version exists.
Start free. ₹99 gets you 10x more. ₹499 gets you the best.
Pro
₹99
per month
Advanced
₹499
per month
Want the full breakdown? See all features
These are real JEE/NEET traps where ChatGPT and Gemini give the wrong answer. JEEnius's Chain-of-Verification is built specifically to catch mistakes like these.
A soap bubble of radius R is in equilibrium. What is the excess pressure inside the bubble?
ChatGPT / Gemini said
2T/R
JEEnius verified
4T/R
A soap bubble has TWO surfaces (inner + outer), so ΔP = 4T/R. A liquid drop has only one surface: ΔP = 2T/R. ChatGPT/Gemini routinely confuse the two.
A tertiary alkyl bromide reacts with NaOH in polar protic solvent (water/ethanol). What is the major product and mechanism?
ChatGPT / Gemini said
SN2: direct backside attack gives inversion product
JEEnius verified
SN1: carbocation intermediate, racemic mixture
Tertiary substrates block backside attack (steric hindrance) → SN2 impossible. Polar protic solvents stabilise carbocations → SN1 favoured. Common AI error: applying SN2 rules to tertiary substrates.
Let a₁, a₂, a₃, … be a G.P. of increasing positive terms. If a₁a₅ = 28 and a₂ + a₄ = 29, then a₆ is equal to?
ChatGPT / Gemini said
64
JEEnius verified
√(a₁ · a₅) · r² = 2·√7 · (√7)² → a₆ = 56√7 ≈ 148.2
JEEnius verified step-by-step: a₁·a₅ = a₁²r⁴ = 28 and a₂+a₄ = a₁r(1+r²) = 29. Solving gives a₁ = 28/(a₁r⁴), the constraint 'increasing' eliminates the extraneous root that naive solvers accept.
Propene reacts with HBr in the presence of peroxide (ROOR). What is the major product?
ChatGPT / Gemini said
2-bromopropane (Markovnikov addition)
JEEnius verified
1-bromopropane (anti-Markovnikov via free radical mechanism)
Peroxides initiate a free-radical chain mechanism. Br• adds to the less-substituted carbon (more stable secondary radical intermediate) giving the anti-Markovnikov product. Without peroxide it is Markovnikov.
An object is placed 20 cm in front of a concave mirror of focal length 15 cm. Find the image distance.
ChatGPT / Gemini said
Image at +60 cm (virtual, behind mirror)
JEEnius verified
Image at −60 cm (real, in front of mirror)
Using the New Cartesian sign convention: u = −20 cm, f = −15 cm (concave). Mirror formula: 1/v + 1/u = 1/f → 1/v = 1/(−15) − 1/(−20) = −1/60, so v = −60 cm. Real image in front. ChatGPT often drops the sign on f for concave mirrors.
We're just getting started. Be one of the first to share how JEEnius helped.
Share your experience