Language Learning Beyond B1
Koydo picks up where Duolingo stops — B1 through C2, with AI that tells you WHY you made a mistake, not just that you made one.
Sound familiar?
You’ve been on Duolingo for months. You hit B1. Now every lesson feels the same. You’re not improving — you’re just maintaining.
Duolingo teaches you to translate. Koydo teaches you to THINK in your target language through CLIL (Content & Language Integrated Learning).
Duolingo says “correct” or “wrong.” Koydo shows you exactly which sounds to fix, at phoneme level, with visual waveform feedback.
Your path forward
15 minutes, fully adaptive. No account required.
Reading B1.2, speaking A2.4, listening B1.1 — granular, honest results.
Targeting your specific gaps — not a one-size-fits-all course.
AI pronunciation scoring, CLIL content, and real conversation scenarios.
Side by side
| Feature | Koydo | Duolingo |
|---|---|---|
| Levels covered | ✓ A1 – C2 | ✗ A1 – B1 |
| Pronunciation feedback | ✓ Phoneme-level AI scoring | ✗ Correct / Wrong only |
| Learning method | ✓ CLIL + immersion | ✗ Translation drills |
| Error explanation | ✓ Tells you WHY + L1 interference patterns | ✗ Just marks wrong |
| Speaking practice | ✓ AI conversation scenarios | ✗ Repeat-after-me only |
| Pricing | Free test + $9/mo | Free (ads) or $6.99/mo |
Comparison based on publicly available feature lists as of April 2026. Duolingo is a trademark of Duolingo, Inc.
Koydo isn't just a language app — it's a complete learning platform. Your Koydo subscription also includes SAT/AP test prep, 8,372 modules across 179 subjects, plus homeschool tools. Duolingo Super is $14/mo for languages only. Koydo Family is $17/mo for everything.
Hear what Duolingo misses
Koydo shows which sounds collapsed, which syllable carried the wrong stress, and what to fix before the next attempt. That is the difference between plateauing at B1 and actually sounding more natural.
Practice target
fotosintesis
Improvement
+20
Attempt 1
64%Attempt 2
84%Coaching Snapshot
Hold the /te/ stress longer so the rhythm lands in the right place.
Keep the middle /sin/ crisp instead of flattening it into one blur.
Repeat once slowly, then once at full speed to lock in the correction.
Why this converts
Learners do not just get a score. They see exactly which sound broke down, what to change, and how quickly the next attempt improves.
Why learners switch
Research shows that structured proficiency frameworks help learners track real progress. Koydo maps every lesson to CEFR levels A1–C2.
Studies on speech perception confirm that feedback at the individual sound level accelerates accent acquisition. Koydo uses phoneme analysis on every spoken response.
Content and Language Integrated Learning (CLIL) research demonstrates that learning subjects through a new language builds deeper fluency than translation drills alone.
Common questions
Take the free placement test — no account required, results in 15 minutes.