Arithmos

A math app for iPhone

A natural way
to learn math.

Arithmos is a calm little math app with short, gentle lessons that actually explain why things work. One long path, from counting to calculus, a few minutes at a time.

We only send one email: the one that says it’s out.

The lessons map: a comb of hexagonal topics with a green vine growing through the completed ones, and Division marked three of ten

The path, part way through Arithmetic.

ΠΕΡΙΠΑΤΟΣ · A walk through

Have a look around.

The Arithmos home screen: the date, a streak garden of twelve flowers, and a Begin Lesson button for Long Division
The day begins here.Your next lesson is one tap away, and every day you practice grows another flower in the garden.
A fractions lesson asking you to drag a line to cut a bar into two equal parts
Lessons you touch.Cut a bar into halves, press counters into an array, carry a ten across the columns. You do the math yourself, from the first screen.
An achievement called Unbroken, earned for practising on seven days, with a Claim 200 XP button
Small wins, kept.Levels, streaks, and sixteen achievements mark the way. Each one you earn pays out XP on the spot.
The Agora, the in-app market, with a featured title and theme packs priced in gems
Spend what you learn.Lessons earn gems, and gems open theme packs, titles, and new ambiance in the Agora.
The profile screen: level four, twelve days learning, seven lessons, 92 percent accuracy, and a grid of achievements
A record that holds.Level, accuracy, hours, days learning. The profile keeps score of the work, and it belongs to your account, not your phone.
  • It goes in order.

    Each lesson builds on the one before it. You're never dropped into something you haven't seen.

  • It's lovely to look at.

    Warm parchment colors, soft slow animation, nothing cluttered. It feels closer to a storybook than a textbook.

  • It's quiet.

    No ads, nothing blinking, nothing trying to keep you hooked. You sit down, do a lesson, and get on with your day.

  • It goes with you.

    Sign in with Google or Apple and your path, streak, and gems are saved to your account. Pick up a new iPhone and everything is already there.

Be there the day it opens.

Arithmos is in the last stretch before launch. Join the list and you’ll hear the day it reaches the App Store.

We only send one email: the one that says it’s out.