Most prep tools grade your guess. kalc reads your reasoning.
The SAT Math score you want is on the other side of cleaner algebra, not more multiple-choice attempts. Here's how kalc is built differently.
Show your work — on screen or on paper
Draw directly on the built-in canvas, or snap a photo of your scratch paper. Either way, every attempt is saved to your dashboard so you can review exactly what you wrote.
AI feedback on the actual math, not just the answer
Claude reviews your handwritten solution and tells you the precise step that broke. No more wondering why you got it wrong — you get a line-by-line explanation.
Adaptive to your weak spots
As you practice, kalc tracks which topics and skills you struggle with and feeds you more of those — less Algebra if you're crushing it, more Trig if that's where you're slipping.
A dashboard that actually tells you something
Topic-level accuracy, recent attempts, missed questions with the original work you submitted. Everything you need to know what to drill next.
Practice under real timing
Full 22-question practice modules timed to match the Digital SAT Math section. Build the pacing that saves you the 50 points you leave on the table with clock pressure.
Never see the same numbers twice
Every question in the bank is templated. The structure repeats so you build pattern recognition, but the numbers change every time — no memorizing answers.
Built for how students actually study.
1
Pick a topic, difficulty, and length.
Before the clock starts, you choose what you're practicing. Trigonometry at medium difficulty for 10 questions, timed. Or a mixed set. Your call.
2
Work through the problem the way you'll work it on test day.
On paper or on canvas. We log your answer, your work image, and your time.
3
Get feedback that actually helps.
If you nailed it, you move on. If not, kalc shows you the worked solution, plus a line-by-line reading of where your work went sideways.
4
Review what you missed — with the original work intact.
Your dashboard keeps every missed question and the handwritten work you did. Come back later, try again, and watch your accuracy climb.