Most math apps quiz you.
This one makes you explain it back.
Build Understanding teaches the math, then hands you a curious AI student who asks why every step works. If you can't answer, you didn't really learn it. That's the whole pitch.
Read it. Build it.
Then teach it back.
The whole product is one loop, three artifacts. Here's what each looks like in the app.
You read.
The notes ask before they answer. Most pages pause to make you predict what's next. Written to be read at human speed, not skimmed.
Suppose we want to know how steep a curve is at one particular point. Not the average slope between two points — that we know how to compute — but the slope right here, at this instant.
Here’s the trick. Pick a second point a tiny distance h away. Compute the average slope between the two. Now shrink h.
You build.
Step by step, you derive the result. Type each algebraic line. Green check when it's right. Hints unlock if you ask.
You teach.
An AI student named Alex asks naïve questions about the topic. Fumble the explanation and your Clarity score tells you exactly where it broke down.