Koydo logoKoydo

Koydo

Help every learner make real progress.

  • Twitter
  • Instagram
  • YouTube
  • TikTok
  • LinkedIn
  • Facebook

Learn

  • Explore All
  • Subjects
  • Flashcards
  • AI Tutor
  • Games
  • Music
  • Arena
  • Tools

Ages & Stages

  • Junior (Ages 3–7)
  • Kids (Ages 8–12)
  • Teens (Ages 13–17)
  • University
  • Graduate Studies
  • Homeschool Engine
  • Family Home
  • Languages (20)
  • Test Prep
  • vs. Duolingo
  • All Apps

Popular

  • Homeschool Curriculum
  • SAT Prep
  • Learn Spanish
  • Learn English (ESL)
  • Homeschool Gradebook
  • AP Calculus Prep
  • vs. Duolingo
  • vs. IXL
  • vs. Time4Learning

Schools & Teams

  • Schools & Institutions
  • For Schools
  • For Teachers
  • School Pricing
  • Enterprise
  • Book a Demo
  • Sponsor a Learner
  • Scholarships

Company

  • About Koydo
  • Prismatic Learning
  • Features
  • Pricing
  • Investors
  • Careers
  • Press
  • Blog

Community

  • Knowledge Commons
  • Spark Awards
  • Refer a Friend
  • Essay Grader
  • Language Learning
  • Research & Blog

Support & Legal

  • FAQ
  • Contact Us
  • Privacy Policy
  • Terms of Service
  • Do Not Sell
  • Accessibility
  • COPPA Notice

© 2026 Koydo·COPPA Compliant·No Ads Ever·Child Safe·20 Languages·

Skip to content
adaptive_diag_badge

adaptive_diag_hero_title

adaptive_diag_hero_subtitle

adaptive_diag_stat_1adaptive_diag_stat_2adaptive_diag_stat_3
adaptive_diag_cta_buttonadaptive_diag_sign_in
🧠

adaptive_diag_feat_irt_title

adaptive_diag_feat_irt_desc

📊

adaptive_diag_feat_scores_title

adaptive_diag_feat_scores_desc

📋

adaptive_diag_feat_plan_title

adaptive_diag_feat_plan_desc

🔄

adaptive_diag_feat_retake_title

adaptive_diag_feat_retake_desc

✓ adaptive_diag_trust_1✓ adaptive_diag_trust_2✓ adaptive_diag_trust_3✓ adaptive_diag_trust_4

adaptive_diag_cta_title

adaptive_diag_cta_subtitle

adaptive_diag_cta_button