Coming soon · iPhone & Android

Make the curve fall.

Calculus 1, played as an action RPG. Every correct answer is an attack. Chain combos, land critical hits and break the bosses that guard each chapter, while you actually learn limits, derivatives and integrals.

Works offline Full Calc 1 course First chapter free
The Tangentfall home screen: Make the curve fall, with progress and the next boss
A boss fight against The Discontinuity, with a chain-rule question to answer

How it plays

Every answer is an attack.

It's a real game first. The maths is the weapon.

A critical hit slashing through a boss after a correct answer
01

Answer to strike

Solve fast for critical hits. Three in a row doubles your damage, six triples it. Charge the Limit gauge and unleash a Limit Break.

An interactive lesson where a secant line turns into a tangent
02

Learn the theory

Stuck? Every skill has an interactive lesson: drag, zoom and watch a secant become a tangent until it clicks.

The Armory showing the legendary Sovereign armor
03

Earn your armor

Twelve armors, from common to mythic, unlocked by beating bosses and keeping streaks. Each one ranks up as you play in it.

Three chapters · three bosses

Something is guarding every chapter.

Clear the skills on the curve, then face what waits at the end. Each boss fights with the ideas of its chapter.

Boss I · Limits & first derivatives

The Asymptote

It lets you get closer and closer. It never lets you arrive.

Boss II · Rules of differentiation

The Discontinuity

A function that shattered itself and jumps where it should connect.

Final boss · Integration

The Fundamental

Derivative and integral, two halves of one theorem. It has three forms.

The whole course

The world is the graph of a function.

Eight skills and three bosses along one curve, covering a full Calculus 1 course from your first limit to the Fundamental Theorem.

LimitsPower RuleTrig & ExpASYMPTOTEChain RuleProduct RuleTangentsDISCONTINUITYAntiderivativesDefinite IntegralsFUNDAMENTAL
Chapter ILimits & first derivativesLimits · Power rule · Trig & exponentials
Chapter IIRules of differentiationChain rule · Product & quotient · Tangents, optimization & related rates
Chapter IIIIntegrationAntiderivatives & u-substitution · Definite integrals · The Fundamental Theorem

Built for studying

Fun that actually counts.

Daily Rift

Ten new problems every day, the same for everyone. Race your friends on the daily leaderboard.

Weak-spot practice

It tracks your accuracy by skill and builds practice runs from the topics you miss most.

Real explanations

Every answer shows why it's right, with the classic mistakes as the wrong options and a graph to see it.

Plays anywhere

Made for your phone, works offline on the bus, with calm and relaxed-timing modes built in.

Be first when it falls.

Tangentfall is launching on the App Store and Google Play. Join the list for launch day, plus early access for the first players.