Preply Kids vs Duolingo Max
Same Bayesian formula, same rubric — so the difference in scores reflects the difference in the courses, not the difference in how we evaluated them.
Preply · Languages
Preply Kids
Duolingo · Languages
Duolingo Max
Per-criterion
There is no fixed curriculum — each tutor builds the lessons. For motivated kids with a strong tutor that means fully personalized, age-appropriate material (games, exam prep like DELF Junior). But it is a marketplace, so structure and quality vary from one tutor to the next.
The instructor is the whole product, and it is the strongest part. Kids tutors average 4.93/5 across nearly 194,000 reviews, and parents repeatedly praise patience, engagement, and the ability to keep young or shy learners involved. The flip side: you have to find the right one.
Lessons start around $3/hour and average roughly $14/hour — cheaper than most live kids tutoring. But the 28-day subscription model, lessons that expire if unused, and refund friction when a tutor is unavailable pull the perceived value down for some families.
1-on-1 accountability and a tutor who feels like family keep many kids engaged far better than a self-study app. The risk is churn from tutor mismatch — a poor fit slows progress until you switch — and from rigid scheduling that punishes busy families who miss the 28-day window.
Live speaking time with a real person is exactly what builds conversational confidence in children, and parents report measurable gains — improved school grades, passed junior exams, comfort speaking. This is the clear advantage of tutoring over app-only learning for kids.
Same Duolingo curriculum as Super with three AI bolt-ons — Explain My Answer, Roleplay, Video Call. AI explanations sometimes get grammar wrong and Roleplay topics are narrow, so the content lift over Super is real but modest.
The "instructor" is GPT-4 behind a Duolingo wrapper. It can explain basic grammar and hold a short roleplay, but multiple reviewers report it makes mistakes and is much narrower than ChatGPT/Claude direct, and far below an italki tutor on actual correction quality.
Roughly $30/month — more than 2× Super's $13. Reviewers flag that ChatGPT Plus/Claude Pro ($20) cover the AI capability with no topic limits, and a weekly italki lesson ($10-15) buys real human correction. Weakest dimension by a wide margin.
Inherits Duolingo's streak engine, leaderboards and daily quests — the strongest retention layer in the category. Max-specific features add little; reviewers describe the AI call as a "try one free, then upgrade" upsell rather than a habit driver.
Roleplay forces some output production, structurally better than Duolingo's tap-the-tile drill, but topic scope is narrow and it does not replicate real-conversation unpredictability. Better than Super at speaking, still well below a live tutor.
Scoring methodology applies identically to every course on the site — see the formula.