Preply Portuguese Tutoring vs Duolingo Korean Course
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 Portuguese Tutoring
Duolingo · Languages
Duolingo Korean Course
Per-criterion
Preply has no Portuguese curriculum of its own — lesson content is entirely whatever the tutor brings. Many Portuguese tutors build a tailored lesson plan after the trial and track progress within the Preply Classroom, which adds a degree of structure absent from a plain pay-as-you-go board. The platform distinguishes Brazilian and European Portuguese clearly, and learners can filter for tutors who specialise in the variety they need, which is more than most apps offer. The ceiling is high — CELPE-Bras prep, business Portuguese, regional-dialect work, pronunciation drilling — but the floor depends entirely on the tutor chosen and on the learner directing sessions. Absolute beginners who expect a ready-made syllabus often feel at sea until they steer a tutor toward a plan.
Preply lists around 2,300 Portuguese tutors, spanning certified teachers and native community tutors from Brazil and Portugal. The pool is noticeably smaller than for Spanish or English, but still large enough to trial several before committing. Tutor profiles show ratings, review counts, intro videos and lesson descriptions, and the platform awards a "Super Tutor" badge to tutors with consistently high ratings, near-perfect attendance and fast response times — a useful signal when navigating an otherwise unvetted marketplace. The key caveat repeated across reviews is that Preply does not control what or how tutors teach and not all tutors are certified, so the quality gap between an excellent teacher and a merely adequate one is real and falls on the learner to screen via trial lessons. European Portuguese tutors are notably fewer than Brazilian ones.
Portuguese tutors on Preply range from roughly $8-15/hour for budget community tutors, $15-25/hour for experienced tutors, and $30+/hour for professional or highly rated instructors, with an overall platform average near $17/hour. That is competitive with italki, where average Portuguese rates sit similarly. The value calculation is complicated by the subscription model: lessons are bought in packages rather than one at a time, and the 28-day auto-renewal means unused credits can be lost. Bulk packages typically discount 15-25% versus single sessions, which benefits committed weekly learners but penalises irregular ones. The lack of free trial lessons — learners pay for the trial, though often at a discounted rate — is another distinction from some competitors.
The subscription credit model cuts both ways on retention. Learners who pre-commit to a recurring weekly slot report it as the most durable Portuguese study habit they built — the auto-renewing package creates a soft commitment that reduces flaking. Learners with busy or irregular schedules find the same model a source of friction: credits purchased in packages up front expire on a 28-day cycle, and several reviewers flagged auto-renewal charges and difficulty stopping the subscription as real pain points. The platform's built-in progress tracking and AI-assisted tools between sessions help active learners stay engaged, but do not compensate for the credit-expiry issue for less consistent learners. Net effect is mildly positive for habit formation.
This is Preply's clearest strength for Portuguese. Regular 1-on-1 conversation with a native speaker is the most direct route from app-bound recognition to real speaking, and reviewers consistently describe twice-weekly sessions cementing pronunciation, verb conjugations and vocabulary they had struggled with for months. The format exposes gaps that apps never surface — the nasal vowel sounds of European Portuguese, the dropped vowels of Brazilian carioca speech, the complex subjunctive usage — and tutors adapt every session to each learner's actual goals, whether that is managing business meetings in São Paulo, travelling through Lisbon, or passing a proficiency exam. Learners who progress to conversational Portuguese overwhelmingly attribute the breakthrough to consistent weekly tutor sessions rather than to any app or textbook.
The Hangul onboarding is the course's strongest asset — letters are introduced gradually inside real words rather than as a disconnected chart, and most reviewers report reading basic Korean within one to two weeks. Beyond that, the Korean tree is smaller than Duolingo's flagship European courses, running to roughly 65 skills across three checkpoints and topping out around A2. Particles, verb conjugation, and the honorific system that governs almost every real Korean interaction are presented as patterns to absorb rather than concepts to understand. Several reviewers also note nonsensical or impractical sentences that would never appear in real conversation.
There is no instructor — the method is implicit pattern-matching. For a language with subject-object-verb word order, grammatical particles, and multiple politeness levels, the hands-off approach bites significantly harder than it does in Spanish or French. Reviewers consistently note that speech levels like formal-polite and polite appear at random without any guidance on which to use or why. The robotic, computer-generated audio is also repeatedly flagged as unnatural and inadequate for teaching the subtle positional pronunciation shifts Korean requires.
The entire Korean course is free, which is its clearest and most defensible strength — zero-cost Hangul exposure and basic vocabulary with no upfront commitment. The free tier is heavily ad-interrupted, which several Korean learners called frustrating, and the heart system can block progress. Super Duolingo at roughly $7–13 per month removes ads and adds unlimited hearts but does not fill the grammar or honorific gaps, so reviewers agree the value lives almost entirely in the free tier. For a beginner who is testing whether Korean is for them, the price-to-content ratio at zero is still favourable.
Duolingo's support is email-only and community-forum-led with no live assistance. Korean has a smaller learner base than Spanish or French, which means fewer third-party explainers and a thinner community to fall back on when the in-app notes are thin. Billing issues, streak-recovery requests, and account problems are the most common support pain points cited across review platforms. The in-app grammar notes that do exist are brief and incomplete, leaving learners to seek outside help for concepts the course never explains.
This is the weakest area, and Korean exposes it sharply. Speech exercises use unreliable voice recognition that sometimes accepts incorrect pronunciation and other times rejects correct answers. There is no spontaneous production and no real conversation practice. The honorific system that governs almost every real Korean interaction is barely explained. Multiple reviewers describe studying Korean on Duolingo for a year and being unable to hold a basic conversation with a native speaker. The course builds receptive vocabulary and Hangul reading, not communicative ability.
Scoring methodology applies identically to every course on the site — see the formula.