STEM
From algebra to robotics
Math, science, engineering, and coding in one orbit.
AlgebraGeometryCalculusPhysicsRobotics
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The one app for every learner in your family.
Sprouts through University. Math, reading, science, art, music, and 56 languages in one family subscription.
Family plan: $17/month or $169/year, each renewing automatically until you cancel. Free plan: no card needed. Cancel anytime.
Koydo learning apps are ad-free.
- Verified child consent
- Student data safeguards
- Child safe
- Koydo learning apps are ad-free
- No data selling
How does your family learn?
Koydo Free
Free lessons from your starter path, selected educational games, and one language. No card needed.
From Free →
Homeschool
Complete K-12 curriculum, gradebook, transcripts, and state guides for all 50 states.
From $20/mo →
Languages
56 languages with AI pronunciation grading and CEFR levels.
From $9/mo →
Test Prep
SAT, AP, and exam prep with adaptive AI coaching and score tracking.
From $9/mo →
Family plan · up to 6 learner profiles
One subscription that grows with your family
Each learner gets their own adaptive experience, pitched at their age and pace.
Ages 2–5
Koydo Sprouts
First concepts, colours, shapes, stories, and parent-guided discovery. Gentle pacing and simple touch targets.
Ages 5–8
Koydo Junior
Emerging reading, counting, phonics, and early science. Big buttons, warm voice, and clear wins.
Ages 11–14
Koydo Learn
Pre-algebra, essay writing, study skills, and deeper science, with tools for working together.
Ages 18+
Koydo University
University study, certifications, career-ready skills, and adult learning in a more professional workspace.
Every age
Koydo Homeschool
Plan lessons, keep a gradebook and transcripts, and teach several children at different levels from one account.
Hands-on
Try it right now
Explore what's inside Koydo — quiz, draw, trace, colour, and more.
🧠
Koydo Playground
Quiz Arena
Koydo Playground
Quick Picks
Real screens
Inside Koydo today
Games, activities, stories and creative tools your learner can open the moment they sign in.
AI help with family visibility
Meet your AI study companion
Ask for a simpler explanation, feedback on writing, language practice, study help, or a fresh daily challenge — all inside one connected learning experience.
- Help across subjects, writing, languages, study cards, and daily practice
- Clear errors instead of made-up answers when AI help is unavailable
- Recent AI activity visible to verified parents and guardians
No learning curve for parents
Start in 30 seconds
- Sign up free — 30 seconds, no credit card
- Pick an activity — games, labs, music, or adaptive lessons
- Watch them learn — the practice adapts, and you see the progress
Safety is the foundation
Designed for kids. Trusted by parents.
- Ad-free learning — attention stays on learning, not advertisers
- Family-controlled AI — manage AI access and review recent AI activity
- Privacy by design — Koydo does not sell children's personal data
- Guardrails, not guesswork — content safety reviews, usage limits and clear errors
Koydo Cortex™ Adaptive Intelligence
Your child's brain is unique.
Cortex learns how it works.
Cortex connects practice, progress, and AI study help so Koydo can offer a useful next step without forcing every learner through the same fixed sequence.
Koydo Cortex™ — Adaptive Intelligence
Real-time adaptive learning, guided by Cortex intelligence
Learning signals that matter
Practice results, completed activities, hint use, and mastery progress help Koydo choose a useful next step.
A complete learning cycle
Learners discover, practice, review, and revisit ideas so progress can build over time instead of ending with one worksheet.
Practice that responds
Difficulty, pacing, and the next activity can respond as a learner works, while family controls keep the experience understandable.
Meridian — Global Curriculum Engine
Content aligned to your school, your language, your world
Meridian maps national frameworks across 195 countries so your child learns content aligned to your school, your language, and your world. Translation changes words — Meridian adapts mental models.
56Languages
195Countries mapped
179Subjects
Koydo Cortex™ Adaptive Intelligence
Koydo grows with your learner.
The interface adapts to each child's age — playful for little ones, clear for Learn, composed for Academy. Same powerful tools, different visual maturity.
Behind every visual, Koydo Cortex™ connects learning activity, practice results, and mastery progress to guide difficulty, pacing, and what comes next.
Everything your child needs to love learning
🎮
Games
47 games
Math, reading, science — disguised as play
Educational games that feel like real games. Each one is mapped to curriculum standards and adapts to your child's skill level.
- Covers math, reading, science, coding, and more
- Difficulty adjusts automatically as your child improves
- Progress tracked across every game session
Learn languages through music
Bilingual songs that teach real vocabulary. Pick a language to start.
🇪🇸
EN ↔ ES
1 of 59 language pairs
🇪🇸
EN ↔ ES
Cepíllate los dientes / Hora de cepillarse los dientes — Otra Vez Deriva
80
🇪🇸
Tap play to start learning
Listen and read along -- vocabulary sticks through melody
56 languages · AI-translated for subscribers · Vocabulary through melody
Subject families
Just some of what we teach
Learning across every core subject, organized into clear families from early learning through graduate-level study.
Health
How bodies work and how we care for them
Body systems, wellness, care, and public health.
AnatomyNutritionNursingPublic Health
Humanities
Ideas, stories, and the shape of history
History, literature, and the ideas that shape culture.
World HistoryLiteraturePhilosophyCreative Writing
Business
Money skills with real-world context
Money, markets, entrepreneurship, and practical life skills.
EconomicsAccountingFinancial LiteracyEntrepreneurship
Languages
Conversation, grammar, and fluency practice
Reading, listening, and conversation across major languages.
SpanishFrenchMandarinArabicJapanese
Early Learning
The first building blocks
Foundations for young learners, built to feel approachable.
PhonicsCountingColors & ShapesSocial-Emotional Learning
Test Prep
Practice built for big milestones
Focused practice for SAT and AP exams and other high-stakes milestones.
SAT MathSAT ReadingAP Calculus examAP Biology exam
...and 179 more subjects across STEM, health, humanities, business, languages, arts, and beyond.
New · 2026
Koydo Meridian™
One curriculum for every stage of study.
From first phonics through doctoral research — built on Koydo's own teaching and the best openly-licensed academic sources in the world.
104
gold concepts
peer-reviewed & cross-corroborated
14
domains
math → languages → arts
9
age bands
ages 2 through 100
100+
CC-licensed sources
MIT OCW · Open Yale · OpenStax · Khan · more
- ✓5,000+ concepts spanning 10 major fields, organised on the international ISCED standard for fields of education
- ✓7 learner stages — foundation, bridge, specialization, advanced, research, lifelong
- ✓6 core pillars every learner starts with — critical thinking, quantitative literacy, scientific literacy, history & culture, communication, sustainability & citizenship
- ✓10 cross-cutting real-world challenges — AI & society, climate, health, cities, democracy, markets, culture, food & agriculture, education, security
- ✓20,000+ content items across 19 kinds (lesson, flashcard, MCQ, lab sim, Socratic dialog, song, story, project, and more)
- ✓Graduate and lifelong/certification concepts bridged from Koydo's own Medicine, Law, MBA, CS and Humanities tracks
- ✓100+ openly-licensed sources registered, with more coming online continuously
- ✓Semantic search — find the right concept in under a second
Built for trust
Every concept records its license, source, and revision history. Koydo's own teaching is labelled. External content is openly licensed.
Built for access
Public REST API + an MCP server so AI agents can query Meridian directly. Weekly bulk exports for researchers and partners (external sources only).
Simple, honest pricing
Start free. Upgrade when your family is ready.
Koydo Free Limited
Free
Start free- No credit card required
- Free lessons from your starter path
- Selected educational games
- 1 included language
- Ad-free, safe learning environment
Best for Families
Koydo Family
$17/mo
- Every core subject, Sprouts through University
- Up to 6 learner profiles
- All 56 languages unlocked
- Parent dashboard & family insights
- Stronger parental controls & routines
- Best value — one plan for the whole family
Homeschool
Homeschool Premium
$20/mo
- Every core subject, Sprouts through University
- Gradebook & report cards
- Lesson planner & curriculum builder
- State guidance & deadlines (50 states)
- Document vault & transcripts
- Attendance logging & co-op support
Homeschool
Homeschool Family
$30/mo
- Everything in Homeschool
- Up to 6 learner profiles
- All 56 languages
- Family gradebook & report cards
- Data export & portfolio
- Best value for homeschool families
What we're building
We keep building for the long run.
Families choosing Koydo today should feel that Koydo is being built for decades, not release cycles. The roadmap shows how we plan to compound the product with creators, partners, and communities around the world.
Frequently Asked Questions
How does Koydo keep children safe?
What ages is Koydo for?
Which devices does Koydo work on?
Does Koydo support homeschoolers with gradebooks and transcripts?
How many languages does Koydo support?
How does Koydo's AI tutoring actually work?
How do I cancel, and what happens to my child's progress?
Start your family's learning journey today.
Join families worldwide who are transforming screen time into learning time.
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🎁 Free: "Screen Time That Counts" — A Parent's Guide (PDF)