Duolingo English Test vs Super Duolingo

Adaptive difficulty and integrated skill design are genuine strengths. Weakened by the absence of a formal essay (only a 5-minute writing sample), opinion-based speaking prompts, and a perceived lack of academic rigour versus IELTS and TOEFL among experienced practitioners.

No published answer keys, rubrics, or section-level guidance — the weakest methodology dimension. Some test-takers receive a score range spanning three CEFR levels rather than a single number, making preparation harder than for IELTS or TOEFL.

$65 per attempt with unlimited free score sends versus $220-plus for IELTS. 48-hour results and no test-centre booking add further convenience. The primary reason test-takers choose the DET over alternatives.

At-home, on-demand testing removes scheduling friction and supports repeated attempts. Three-tier human review provides oversight. Weakened by documented AI false-flag incidents and a 72-hour appeal window that can frustrate test-takers.

6,000-plus programs in 110-plus countries accept it, including 98 of the US News Top 100 universities and all Ivy League schools. IELTS is accepted by 12,500-plus organisations — more than double. UK/Australian visa routes and professional bodies don't yet accept at-home tests.

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.