The problem

Worksheets don't know what you know.

You don't get faster by grinding facts you've already nailed. You get faster by hammering the exact ones that slow you down — every single day.

Easy reps, wasted time

Static drills keep handing you facts you already own and skip right past the tiny gaps that cost you seconds.

Right isn't the same as fast

Getting the answer eventually isn't fluency. Math Addicts tracks your speed so you can feel yourself getting quicker.

Practice that feels like a chore

Ads, logins, and pressure kill the habit by day three. This opens straight into play and keeps it light.

Who it's for

One app. Every kind of fast.

Kids, grown-ups, and the teacher running the whole room — the loop adapts to each of them.

Kids & homeschoolers

Practice they ask to do

The after-state: confident at the board, not dreading it.

Phib turns the daily streak into a game worth keeping. No shaming, no failing out — just a good dog who's thrilled every time they get one right.

Adults brushing up

Be the one who just knows

The after-state: the tip, the split, the discount — done in your head, first.

Two minutes a day rebuilds the mental math you let rust. Set your real age (up to 99), pick your level, and watch your response time drop week over week.

Teachers & tutors

Whole-class fluency, zero admin

The after-state: a room that just gets faster.

Send students to a free trainer that meets each one at their level and keeps them coming back — no setup, no grading, no logins to manage.

Why it works

A playful trainer, not a worksheet.

Every answer tunes what comes next, so three minutes does the work of a much longer drill.

Speed-adaptive difficulty

Fast and accurate? It ramps up. Miss one? It brings that fact family back soon, before you forget. No shaming, no failing out — just focused practice that respects your time and your speed.

Teaches the trick

A one-tap tip on every problem reveals the fast mental shortcut — not just the answer.

See yourself speed up

Watch your response time fall, week over week.

Streaks, gems & combos

The daily-habit loop that makes you actually come back.

Private & offline

Guest progress stays on your device. Install it like an app and practice anywhere.

Phib, a sleeping golden retriever whose curled body traces the Fibonacci spiral, with the golden-ratio grid drawn over it

1 · 1 · 2 · 3 · 5 · 8 · 13 …

Meet Phib

The good dog with a secret in his tail.

Phib is the golden retriever who's addicted to your progress. Every correct answer is the best thing that's ever happened to him. Miss one and he just leans in closer — again, again.

His name comes from the Fibonacci sequence: a chain of numbers where each one is the sum of the two before it. Start with 1 and 1, and it grows on its own — 2, then 3, then 5, then 8 — the same way a streak compounds when you just keep showing up.

11235813

Say "Fibonacci" out loud and the front of it sounds like Phib. That sequence draws a perfect spiral in nature — in shells, sunflowers, pinecones. Look closely at Phib's curled tail and you'll see it too. We won't say more than that.

He waits by the door for your two minutes a day.

A miss is just one more try — never a mistake to feel bad about.

Playful enough for a six-year-old, calm enough for an adult.

How it works

Faster in three minutes a day.

Tell it about you

Your age, country, and level set the starting point. Adults pick their real age — no kid labels, no being pushed around.

Practice while Phib cheers

Answer quick reps while the engine watches your speed and Phib celebrates every win.

Keep the streak, get faster

Review what slipped, hold your streak, and watch your time and accuracy climb.

Get started

For you — or someone you love.

Start your own streak, or set one up for a kid, a parent, or a friend who keeps saying they're "bad at math."

Start your own streak

Open straight into practice. No account, no card, no ads. Just you, the numbers, and a good dog.

Start free

Onboard a loved one

Set the level for someone you care about and hand it over. Phib takes it from there and keeps them coming back.

Onboard someone

Free guide

Six mental-math tricks that make you instantly faster.

These are the same shortcuts Math Addicts teaches on every "Learn more" tap. Read them once, then let the app drill them until they're automatic. Try each worked example in your head before you peek.

TRICK 01

The ×9 shortcut

Nine groups of anything is just ten groups minus one group. So to multiply by 9, multiply by 10 — which is effortless — and subtract the number once. It turns the hardest table into the easiest one.

9 × 7 → 70 − 7 = 63 · 9 × 26 → 260 − 26 = 234

TRICK 02

Make a ten

Your brain adds to a round ten with zero effort. When two numbers cross a ten, move just enough to complete the ten, then add what's left. This one trick removes almost all the strain from mental addition.

8 + 5 → 8 + 2 + 3 = 13 · 47 + 36 → 47 + 3 + 33 = 83

TRICK 03

×5 is half of ×10

Five is exactly half of ten, so multiply by 10, then cut it in half — two easy steps instead of one hard one. (It flips, too: to divide by 5, divide by 10 and double.)

5 × 18 → 180 ÷ 2 = 90 · 5 × 42 → 420 ÷ 2 = 210

TRICK 04

Subtract by counting up

Borrowing digits in your head is where subtraction falls apart. Instead, climb from the smaller number to the bigger one in easy hops — up to the next ten, then the rest — and add up your hops.

63 − 58 → 58→60 is 2, 60→63 is 3 → 5

TRICK 05

Squares that end in 5

Any number ending in 5 has an instant square: multiply the tens digit by one more than itself, then write 25 after it. It looks like a party trick; it's actually just algebra folded flat.

35² → 3 × 4 = 12 → 1225 · 85² → 8 × 9 = 72 → 7225

TRICK 06

Double twice for ×4

Doubling is the one multiplication everyone can do. So ×4 is double-double, and ×8 is double-double-double. Chain tiny easy steps instead of attempting one big leap.

17 × 4 → 34 → 68 · 13 × 8 → 26 → 52 → 104

Questions

Everything parents and players ask.

Is Math Addicts really free?

Yes. Practice, streaks, the adaptive engine, Math Blitz, and the Review deck are free, with no credit card and no trial timer. A guest can play forever without creating an account. An optional Premium tier (harder difficulty tiers, full analytics, no ads) exists for adults who want it.

What ages is it for?

Everyone from early counters to adults who want their mental math back. Onboarding asks your age and country and sets a starting level automatically — kids get age-appropriate facts, adults get a genuinely challenging pace. The adaptive placement test tunes it further as you play.

How do you handle kids and ads?

Children never see ads. Ever. Ads can only appear for adult accounts, and only on the results screen after a finished practice session — never during practice, never for child accounts or anyone whose age we can't verify as 13+. Child accounts are created and controlled by a parent, sign in with a private code instead of an email, can't make purchases, and appear on public leaderboards only under an anonymous handle. See our privacy policy for the full details.

Does it work offline?

Yes. Math Addicts is an installable web app (PWA): add it to your home screen and it works with no connection — on the bus, on a plane, anywhere. Your progress saves on the device and syncs to your account the next time you're online.

Do I need an account?

No — you can practice as a guest indefinitely. A free account adds cross-device sync (start on the school laptop, continue on your phone), parent-managed child accounts, and a spot on the Math Blitz leaderboard.

What makes it different from flash cards?

Flash cards treat every fact the same. Math Addicts times every answer and rebuilds each session around the exact facts that slow you down — then teaches the mental shortcut for them (the same tricks in the free guide above). You spend your minutes on your gaps, not on what you already know.

Answer before
you can think.