About Symboku
Sudoku with a twist — think in symbols, not numbers.
Our Story
Symboku was born from a simple idea: what if Sudoku puzzles could teach you something new every time you played? Instead of the usual numbers 1 to 9, what if the puzzle grid was filled with world flags, Japanese hiragana characters, musical notes, or times tables?
That question sparked the creation of Symboku — a puzzle game where traditional numbers are replaced with thematic symbol sets, transforming every puzzle into a learning opportunity. Whether you're a child learning multiplication, a student studying the periodic table, or an adult exploring world flags, Symboku makes the process genuinely enjoyable.
We believe that the best learning happens when you don't realise you're learning. By embedding educational content into the familiar, satisfying framework of Sudoku, Symboku creates moments of discovery that stick.
What Makes Symboku Different
60+ Symbol Sets
From world flags and planet symbols to times tables and chemical elements. Each set turns a puzzle into a mini-lesson.
Structured Learning Paths
Progressive courses guide you from beginner to expert. Master times tables, learn Japanese writing systems, or identify aircraft silhouettes.
Four Grid Sizes
4×4 grids for young children, 6×6 for intermediates, classic 9×9, and challenging 12×12 for advanced players.
Built for Everyone
Designed for casual players, families, students, and schools. Classroom tools let teachers set assignments and track student progress.
Our Educational Mission
Symboku is designed to align with educational frameworks including the UK National Curriculum and Common Core State Standards. Our learning paths are structured to support real classroom learning:
- Mathematics: Times tables mastery from 2× to 20×, geometry concepts, number patterns
- Geography: 168 world flags across 16 regions, from the British Isles to Oceania
- Languages: Japanese hiragana and katakana, Greek alphabet for STEM students
- Science: Periodic table elements, planet identification, geometric shapes and solids
- Music: Musical note reading and notation recognition
- Life Skills: Telling the time on analog clocks
The Company
Symboku is built and operated by Symboku Fun Limited, a company registered in England and Wales (Company Number 16933239). We are based at 43 Bridge Road, Grays, England, RM17 6BU.
Symboku is powered by the GridEngine platform — our underlying technology that generates, validates, and delivers puzzle experiences at scale.
Child Safety & Privacy
We take the safety and privacy of our younger players seriously. Symboku is fully compliant with COPPA (Children's Online Privacy Protection Act) and the UK Data Protection Act 2018. Children under 13 only see contextual, non-personalised advertisements. We never collect personal data from children without parental consent.
Read our full Privacy Policy for complete details on how we protect your data.
Get in Touch
We'd love to hear from you — whether you have a question, a suggestion for a new symbol set, or you're interested in using Symboku in your school.