8ctoMath - Maths Race for Kids

8ctoMath is mental arithmetic practice for children, set on a bright seabed. 8cto the octopus is the trainer, Brainy the squid is the rival, and every quiz is a race of 30 questions: answer, swim ahead, and reach the treasure before Brainy does.

THE MATHS ADAPTS TO YOUR CHILD
• Every kind of calculation has its own level. It steps up when your child gets them right and back down when they get too hard.
• Calculations that cause trouble come back more often; the ones your child knows well, less often.
• The wrong answers on offer are the mistakes children really make, so the right one has to be worked out, not guessed.
• Brainy takes a little longer than your child usually needs, so beating him means being a bit quicker than usual.
• A new child only gives a nickname and their age (4 to 12+), and 8cto picks where to start.

WHAT THEY PRACTISE
Adding and taking away (with or without zero), times tables, sharing (division) and the big times tables, such as 14 × 7. Pick any mix before each quiz.

REWARDS WORTH WORKING FOR
• A quiz with no mistakes wins two stickers, one mistake still wins one. There are 200 to find: fish, flippers and feathers, claws and shells, squishy and glowing creatures, treasures, and 20 rare ones.
• Stick them onto eight pages: a coral reef, a shipwreck, an octopus village, a kelp forest, the deep sea, a lagoon, the open sea and the north pole. Drag, turn, flip and resize them.
• Pearls for a flawless quiz and for beating Brainy, to spend in the shop on exactly the sticker your child wants.
• Every child builds their own picture from a sea creature, a hat, a thing and a backdrop, and races as that creature.
• Brothers and sisters can give each other stickers.

FOR PARENTS
• Up to six children on one device, each with an optional four-digit PIN.
• A progress page for every child, which they can open too: the days practised and the streak, minutes and quizzes, each level over time with the share of right answers, and the calculations still tricky.
• If you like, 8cto reminds the children to practise once a day, at a time you choose.
• Adjust a level if it is clearly too easy or too hard.
• No ads, no analytics, no tracking. Plays offline and needs no account.
• Voices, music and sound effects can be switched off; calm motion for children who find animation distracting.
• In English, German, Spanish and French, voices included.

8CTOMATH+
The free version has all the maths: the quizzes, the race and the adaptive engine are the same. It collects the first five stickers of each group and sticks them on two pages. 8ctoMath+ is one purchase, no subscription, for every child on the device. It opens the whole sticker book (all 200 stickers, rare ones too, and all eight pages), every creature, hat and backdrop for the avatar, each child's whole progress rather than the last seven days, and backup and sync between devices signed in to the same account.

Questions or ideas? Write to hi@8cto.net
Privacy policy: https://8cto.net/privacy.html

Recent changes:
Welcome to 8ctoMath, mental maths for children in an underwater world. Every quiz is a race of 30 questions against Brainy the squid.

Adding, taking away, times tables, sharing and big times, each at a level that adapts to your child.

Stickers for an eight-page book, your own sea creature to race as, a progress page for every child and a daily reminder from 8cto.

No ads, no tracking, plays offline, in English and German. 8ctoMath+ opens the whole sticker book, all the progress and sync.