New problems today. New problems tomorrow.
Workbooks end when you memorize them. Never the same problem twice — across AP and SAT math.
Five fresh problems on signup. No card. Easy & Standard.
See how the engine writes problems by type
One engine. Four exam tracks.
4 courses · 27 units · 174 topics with always-new practice.
AP Calculus AB / BC
Limits through Series — every CED topic.
Digital SAT Math
All four College Board domains.
AP Statistics
Nine units, from data to inference.
AP Precalculus
Functions, trig, polar, vectors, matrices.
Practice by problem type
Pick a type. Generate fresh problems until the approach is automatic.
Chain Rule
Composite function differentiation.
Try this type →Systems of Two Linear Equations
Solve, interpret, and check the intersection.
Try this type →Confidence Interval for One Mean
Build a t-interval and state the conclusion in context.
Try this type →Polar Function Graphs
Sketch the rose curve and identify its symmetry.
Try this type →Why workbooks run out
A finite question bank rewards memory, not understanding. Mathfolis flips that.
Drill a fixed set. Re-recognize the same problems. Mistake recognition for fluency.
Pick a problem type. Get a fresh problem every time — calibrated to your level, never repeating.
The approach, not the answer. When the next test surprises you, the method already feels familiar.
Free to start. Pass when you're ready.
No subscription — pick a fixed access period and keep practicing.
Daily generation limit varies by pass · Access expires at the end of the period
Grading and weakness diagnosis come with the pass. The more you solve, the sharper your diagnosis gets.