Updated August 8, 2026

Duolingo alternative for Japanese: an honest look

Short version: Duolingo is good at the hardest part of language learning, which is getting you to show up. It is free to start, it teaches kana properly, and its streak does real work. Where it runs out for Japanese specifically is vocabulary depth, kanji, and JLPT alignment, because those were never what the course was built for. Duolingo designed its Japanese course to bring learners to CEFR A1 and says it teaches all the vocabulary and grammar needed for JLPT N5. That is the design target, stated by Duolingo itself, and N5 is the entry level of five. Moji - Learn Japanese Daily for iPhone is a dedicated tool for the lane that opens up after that: 7,435 curated words with kanji mnemonics, running FSRS-6. This page is the comparison. If you want the full roadmap of what to add and in what order, that lives at what to use after Duolingo.

What Duolingo genuinely does well

This part is not a courtesy paragraph. Duolingo solves problems that most study tools quietly fail at.

It gets you to open the app. Duolingo reports that learners who reach a 7-day streak are 3.6 times more likely to complete their course, and that over 6 million people are holding a streak of a week or more. Every serious study tool depends on daily contact, and most of them just hope you provide it. Duolingo engineers for it.

It is free to start, with no setup. You install it and you are studying. Anyone who has spent an evening choosing an Anki deck knows exactly how much that is worth.

It teaches kana properly. Hiragana comes first, katakana lands early in Section 1, and kanji arrive once you can read both. Being able to read kana is the single wall most beginners never get over, and Duolingo walks people through it at scale.

It has published efficacy research. Duolingo runs and publishes studies on whether its courses work, including reading and listening outcomes measured against independent assessments. The published results are for Spanish and French rather than Japanese, so do not read them as a Japanese claim, but a company that measures itself in public is doing something most of this industry does not.

If any of that is what is keeping you consistent, do not throw it away to look serious.

Where Duolingo runs out for Japanese

Vocabulary volume. A course whose stated ceiling is CEFR A1 and JLPT N5 is, by design, working in the low end of the vocabulary range. Duolingo does not publish a word count for the Japanese course, so nobody can give you an exact figure. What you can reason about is the target: reading a manga page, following a video without subtitles, or sitting N4 needs multiples of an A1 vocabulary. This is the gap that hurts most, and it is the one a well-ordered spaced repetition system closes fastest.

Kanji depth. Duolingo’s own explanation is that kanji are introduced gradually as parts of whole words rather than as characters studied on their own, spread out deliberately to avoid overloading learners. That is a defensible teaching choice, and it produces recognition in context. What it does not produce is systematic coverage: multiple readings, which words share a component, or stroke order and handwriting. Recognition in context is fragile, and it tends to collapse the first time a familiar kanji shows up inside an unfamiliar word.

JLPT alignment. The course maps to a CEFR-based framework, not to a per-level JLPT syllabus. Worth knowing: the JLPT organizers publish level descriptions but no official vocabulary or kanji lists, which is exactly why prep estimates you see quoted online vary so much. If your goal is to sit N4 or N3, you want material organized the way you plan to study it, with visible per-level counts, so you can tell what you have covered and what you have not.

None of these are bugs. They are the consequences of building one product that teaches kana, vocabulary, grammar, and habit simultaneously, to beginners, for free.

Duolingo vs Moji at a glance

What a dedicated vocabulary and kanji tool adds

Moji does one job. The catalog is 7,435 hand-curated words, every one carrying an example sentence with an English meaning. 5,300 entries have hand-written kanji mnemonics, 7,029 carry pitch-accent annotation, and 5,698 carry a usage note, written only where there was a true, non-obvious fact worth knowing and deliberately left blank otherwise. Meanings are trimmed to about three friendly glosses of 30 characters or less, with the dictionary parenthetical noise stripped out.

The JLPT breakdown is published because it is the thing you are actually shopping for: 746 words at N5, 661 at N4, 2,101 at N3, 1,535 at N2, and 2,184 at N1, plus 208 kana-stage words.

Study order is frequency-derived from JPDB data and then hand-edited, which matters more than it sounds. Core particles are pulled forward on purpose, so は (wa) enters around position 63, が (ga) around 89, か (ka) around 109, and を (o) around 129, each introduced with example sentences chosen to show where the particle sits. Frequency lists alone do not know that a particle is only learnable in context. The reasoning is written up at why word order matters.

Kanji are taught through the words that use them, with mnemonics built from real components rather than invented stories. 好き (すき, “liking, fond of”) is 女 (woman) plus 子 (child): a woman holding her child, something dearly liked. More on that at our kanji mnemonic method.

The scheduler is official FSRS-6, all 21 parameters, at 90% target retention, with a two-button swipe (left for again, right for good) and no daily review cap. Details and the honest tradeoffs are at /fsrs.

Moji has a streak too, doing a smaller job

Worth being clear about, since streaks are the thing Duolingo is famous for. Moji has a streak, and home screen and lock screen widgets that show due cards, streak, and lifetime words learned. It is not a competing motivation system with leagues and characters. It is a due-card count on your home screen so the day’s reviews are visible without opening anything. If gamification is what makes studying tolerable for you, Duolingo does that far better, and that is a real reason to keep it.

Choose Duolingo if

• You are still learning kana, or you just started. Finish the free thing that teaches it well before paying for anything.
• The streak is the only reason you study. Habit beats optimization. A tool you open every day beats a better tool you open weekly.
• You are on Android, or you want web access. Moji is iPhone-only and there is no Android version.
• You want one app that touches grammar, vocabulary, listening, and reading. Moji does not teach grammar and does not pretend to.
• Spending nothing is a hard requirement and you want a full course. Duolingo’s Japanese course is free.
• Gamification is the point. Leagues, quests, and characters are a genuine product, not a gimmick, and Moji has no equivalent.

Choose Moji if

• You can read kana, you finished or stalled in the Japanese course, and the thing you feel missing is words.
• You want kanji handled through vocabulary, with mnemonics and handwriting practice, rather than picked up incidentally.
• You are aiming at a JLPT level and want per-level counts you can actually see. The best app for JLPT N5 vocabulary goes deeper on what that level needs.
• You want to skip the several hundred words you already know instead of grinding through them to prove it. The placement test is the first screen.
• You have already tried Anki and bounced off the setup. That comparison is at Anki alternative for Japanese.

The realistic answer is both, for a while

You do not have to pick. Keep Duolingo as a warmup if it is holding your habit together, and put the real study minutes into vocabulary and kanji, plus a dedicated grammar tool. Two or three tools, not six. The full sequencing is at what to use after Duolingo, and for a sober estimate of the road ahead, we did the math on how long it takes to learn Japanese.

If the vocabulary and kanji lane is the one you want filled and you are on an iPhone, Moji is free to start, and the free tier is the entire comprehension path rather than a trial. Take the placement test, see where you actually land, and study the first hundred words before deciding whether any of this was right. Download Moji on the App Store

Sources

• Duolingo, “How we invented a new way to teach one of the most difficult languages to learn” (JF Standard, CEFR A1 on completion, all vocabulary and grammar needed for JLPT N5): https://web.archive.org/web/20251206154854/https://blog.duolingo.com/how-we-invented-a-new-way-to-teach-one-of-the-most-difficult-languages-to-learn/
• Duolingo, “A new tool for learning to read Japanese on Duolingo” (hiragana first, katakana early in Section 1, kanji later once both are learned; kanji introduced as parts of whole words and spread out to avoid overload): https://blog.duolingo.com/learning-to-read-japanese-characters/
• Duolingo, “How the Duolingo streak builds habit” (7-day streak learners 3.6x more likely to complete their course; over 6 million learners with a 7-day-plus streak): https://blog.duolingo.com/how-duolingo-streak-builds-habit
• Duolingo, “Can you reach intermediate reading and listening proficiency with Duolingo?” (published efficacy research, Spanish and French courses): https://blog.duolingo.com/effective-intermediate-learning/
• JLPT, “N1-N5: Summary of Linguistic Competence Required for Each Level” (official level descriptions; no official vocabulary or kanji lists are published): https://www.jlpt.jp/e/about/levelsummary.html
• JMdict dictionary data (EDRDG), the dictionary base for Moji’s catalog: https://www.edrdg.org