kkalc
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Handwriting-first SAT Math prep

Write out the math. Ace the SAT.

kalc is the SAT Math tool that actually reads your work. Draw your solution, submit a photo, or both — and get instant AI feedback on exactly where your reasoning went off the rails.

Start practicing See how it works

Free during beta · No credit card required

Live demo — try it now
Algebra · Linear equation · Variant 1 / 3

Demo limits
This is a public demo with a small daily analysis cap per visitor and a tight focus on SAT math. For unlimited practice across the full bank, sign in with an access code.

Not another flashcard app.

SAT Math isn't won by clicking multiple choice. It's won by writing the algebra cleanly under time pressure. kalc is built around that.

Show your work
Draw on the built-in canvas or snap a photo of scratch paper. We save every attempt.
AI reads your handwriting
Claude reviews your solution and tells you exactly which step broke, not just that you got it wrong.
Adaptive by topic
We surface weaker topics more. Strong on trig? You'll see less of it and more of what needs work.
Dashboard that matters
Topic mastery, recent attempts, missed questions with your original work — all in one view.
22-question
Timed practice modules that mirror the real Digital SAT Math section.
5 topics
Algebra, Advanced Math, Problem Solving & Data Analysis, Geometry, Trigonometry — all covered.
Unlimited variants
Every question is templated. You'll never see the same numbers twice.

Simple pricing.

Free during beta. Pro is on the way for students who want the full adaptive engine.

See full pricing
Free
$0
Everything you need to start.
  • Full question bank access
  • Handwritten work + AI feedback
  • Dashboard + progress tracking
Start free
Pro
Waitlist
Coming soon
For students in the home stretch.
  • Everything in Free
  • Full timed practice tests
  • Adaptive weak-spot drilling
  • Score predictor
Join waitlist

Ready to actually improve?

Grab an access code from your tutor or request one below, and start practicing in under a minute.

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