12,400+
handwritten steps read
94%
handwriting accuracy
<2 sec
to read a complete attempt
78%
closed top mistake in 2 sessions
ch. 01 · the slate
Our deterministic algorithms take you through the right path to solve the problem.
What InkSolver sees · step by step
Step 1 — Substitution validated ✓
lim(1+8/x)^(x/8)·48
Rewrites to isolate the standard e-form. Exponent factor 48 correctly preserved.
Step 2 — Standard limit form validated ✓
lim(1+1/y)^y = e
Correctly identifies and reaches the e-form. Substitution complete.
Hint · Step 3
The limit lim(1+1/y)^y gives e as a base value — not a fraction. Now raise that base to the power of 48.
Step 3 — Base inversion error ✗
Wrote (1/e)^48 → should be e^48
The standard limit gives e as the base — not 1/e. The power 48 is correct. Only the base is inverted. Exactly here.
Expert solution graph says next →
Concept: standard limit forms. The hint above gave you the building block. Try a similar problem — same structure, different multiplier.
Practice similar →ch. 02 · the category
We don't directly let AI teach you. Our expert-designed solution graphs correct your handwritten steps through our validators.
ch. 03 · what it does
Our subject experts have built solution graphs for every problem type. Our validators check each handwritten step against those graphs — line by line — before saying anything.
"Not just wrong — the exact step that broke, and why."
Solved one limit? We generate infinite variations — same structure, different numbers — until the method is instinct, not just memory of one question.
"Master the concept, not the question."
Reads every step as you write — fractions, exponents, substitutions above the line, crossed-out attempts. Not after you submit. As you go.
"Reads as you write, not after you submit."
ch. 04 · what they say
78%
The difference: they finally saw the exact step that kept failing — not just that they were failing.
"It caught that I was applying the limit form correctly but inverting the result — 1/e instead of e. Something I'd done wrong in every test for a month."
— Grade 10 student, Hyderabad
"She stopped asking me for the answer and started explaining which step she got stuck on. That was new."
— Parent, Grade 10
"Feels like someone who actually notices what you did — not just whether you got the answer."
— Grade 9 student
"I'd been applying the product-to-power rule wrong in every integration problem. It showed me exactly which line the error crept in."
— Grade 10 student
"He's more willing to attempt problems he would've skipped before. That shift in confidence is what we noticed first."
— Parent, early access · Grade 9
ch. 05 · how it works
Pick up the stylus. The rest happens on the slate.
01
Ink it
Write on the slate — stylus, finger, or trackpad. Exactly like paper.
02
Reads as you write
Every step captured in real time — not after you submit.
03
Validates each step
Solution graphs check every line and pinpoint the exact break.
04
Stuck? Get a hint
Ask for a hint without seeing the answer. Guided — not given.
05
Practise infinitely
New variations of the same concept until the method becomes instinct.
ch. 06 · your turn
Practice problems are waiting. Write your solution on the slate, step by step, and let InkSolver analyze every line.
Start practising free →Early access · Grade 9 & 10 Math
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