It remembers.
You do the math.
Inkerval is handwritten practice for university math. Solve real problems with your own hands, grade yourself honestly, and let a memory model decide what comes back tomorrow. What you learn stays learned.
Be first in when the doors open. No spam, ever.
How it works
Practice like it's your notebook.
Schedule like it's a science.
Solve by hand
Real problems on paper that grows with your work. No multiple choice, no typing formulas.
Grade honestly
Solved, shaky, or revisit. Your own verdict. Wrong answers never count against you; they just come back.
Let it schedule
Spaced repetition tuned for mathematics, not flashcards. Open the app, clear the review deck, done.
What's inside
Two courses at launch. Every problem verified.
Probability I
13 topics · 400+ problems
Counting to the central limit theorem: conditional probability, Bayes, random variables, named distributions, joint distributions, inequalities and the LLN.
Differential Equations
10 topics · 300+ problems
First order to systems: separable, exact, linear, oscillations, Laplace transforms, with modeling problems that start from words, not formulas.
No ads. No trackers.
Your work is yours. Your progress is real.