Zappsum
iOS · Mental Math
Mental math that actually sticks. Compete against bots, drill your weak spots, and watch your rating climb.
Free to download · iOS
How It Works
Take a 15-question test for each skill. Score 85% or above to unlock Speed Match for that topic.
Spaced repetition surfaces your weak cards first. Study lessons, work through examples, and run timed drills until the answers come fast.
Face off against bots in a timed battle. Win and your rating climbs. Lose and it drops. Your 1000-point rating is on the line every round.
Core Modes
Player vs. AI — timed battles across a chosen math topic. Beat bots to climb your personal rating, lose and it falls. Five opponents stand between you and the top rank.
Rating starts at 1000. Every match counts.
Structured lessons with worked examples, concepts, and tips — organized into course packs by topic. Build fluency before the pressure is on.
Timed drill rounds powered by spaced repetition. Due cards surface first so you're always reinforcing the skills that need it most — not just the easy ones.
15 questions per skill level. Score 85% or above to pass and unlock Speed Match for that topic. No shortcuts — earn the right to compete.
Progress & Mastery
Per-skill mastery flags, live due card counts, and a local rating that moves with every Speed Match. Know exactly where you stand — and what to work on next.
Content Packs
The building blocks of mental math.
Core arithmetic levels — the fundamentals every mental math session starts from. Included with the app, no purchase required.
Fractions, ratios, measurements — the math you actually use.
One-time purchase. Unlocks a full suite of real-world math skills that go beyond rote arithmetic.
Powers, algebra, and beyond.
The next frontier. More advanced topics for those who want to push their mental math into new territory.
Zappsum is coming to iOS. Free to download, with optional content packs to go deeper.
Coming to App StoreiOS · Free Download