Preply Kids vs Super Duolingo
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
Super Duolingo
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.
Vocabulary coverage is broad and the spaced repetition loop is well-built, but reviewers consistently flag missing grammar explanations, slow new-vocab introduction and shallow per-topic depth — especially noticeable past the early units.
There is no instructor — the method is gamified drill-and-feedback. It works as a habit engine for vocabulary, but multiple reviewers note the lessons "don't explain much unless you dig into submenus" and the website tips are stronger than the in-app teaching.
The free tier is genuinely strong and is the right starting point for most learners. Super Duolingo at roughly $13/month or $84/year mainly buys ad removal, unlimited hearts and Practice Hub — useful for heavy daily users, marginal for casual ones.
The single strongest part of the product. Streaks, leaderboards, push notifications and daily quests genuinely keep people learning — multi-year streaks are common across the sample. The same gamification, though, has tipped toward attention manipulation for many long-time users.
Reviewers converge that Duolingo gets motivated learners to roughly A2, occasionally B1 reading, and rarely further on its own. Hundreds-of-hours users report being unable to hold a conversation without supplementing with tutors, comprehensible input or immersion.
Scoring methodology applies identically to every course on the site — see the formula.