Shirabe vs Duolingo

Duolingo is the best in the world at one very hard thing: getting somebody to show up tomorrow. The streak, the lessons, the sheer polish of the onboarding. Millions of people have started Japanese because of it, and a good number of them are still going. That’s not nothing. Most language apps can’t get anyone past week one.

This page is about what happens in month six.

The ceiling is real, and everyone hits it

At some point the Duolingo Japanese course stops matching the Japanese you want to consume. You can hold a lesson streak of four hundred days and still open a manga, or a news article, or the subtitles of an episode, and understand very little of it.

That isn’t a failure of effort. It’s structural. A course teaches a syllabus: a fixed sequence of sentences, chosen to build a curriculum. Real material doesn’t respect syllabi. It uses whatever words it wants, at whatever frequency, and the vocabulary you need is decided by what you happen to be reading.

The move that gets people past that ceiling is always the same: start studying the words in front of you, from the things you actually want to understand. That’s the entire premise of Shirabe.

Recognising an answer isn’t knowing a word

Duolingo’s exercise formats (tap-the-tiles, multiple choice, matching pairs) are excellent for keeping a session moving and low-friction. They’re much weaker at proving you know something.

Picking the right tile from four options is recognition with heavy scaffolding. It’s the reason the streak can be long while the reading is still hard: you’ve been practising the exercise, not the word.

Spaced repetition asks a different question. Here is the word, cold, with no options: what does it mean? That’s harder, it’s less fun, and it’s what actually transfers to reading. Shirabe uses FSRS to schedule those questions so each word comes back just before you’d forget it, which is the least amount of work for the most retention.

From a course to your own material

The practical shape of Shirabe is a dictionary with a memory:

• Look up a word, from a manga page, a subtitle, a news article, anything.
• Save it. The card arrives with reading, pitch accent, audio and an example sentence attached.
• Review it on an FSRS schedule.
• Watch a real number, words you know, go up.

There’s no course to finish, because your material is the course. If you’re studying to read one specific series, that series decides your vocabulary list.

Where Duolingo genuinely wins

Getting started from zero. If you know no Japanese at all, Duolingo’s first weeks are gentler and better designed than ours. It teaches kana patiently, it explains nothing scarily, and it makes the first month feel achievable.

Habit. The streak mechanic is genuinely world-class behavioural design, and habit is most of language learning. We have a study streak and daily goals, but we’re not going to claim we out-engineer Duolingo on motivation.

Price. Duolingo’s free tier is usable. Shirabe’s dictionary is free forever, but the study system is paid.

Who should stay on Duolingo

• You’re starting from absolute zero and want the gentlest possible on-ramp.
• The streak is the only reason you study at all. Protect that, it’s doing real work.
• You want a single free app and no second tool.
• You’re studying casually, for fun, with no particular material in mind. That’s a completely valid way to have a hobby.

Who Shirabe is for

• You’ve done a long Duolingo streak and can’t read the thing you wanted to read.
• You have specific material in mind, a series, a game, a book, an exam.
• You want to know how many words you know, and how much of a given text you’d understand.
• You’d rather study 20 real words than complete 5 lessons.
• You want the whole thing in Spanish rather than through English.

The honest sequence

For a lot of people the right answer isn’t Duolingo or Shirabe. It’s Duolingo first, then this.

Use the owl to get through kana and your first few hundred words while the habit forms. When the lessons start feeling further and further from the Japanese you actually want to understand, that’s the signal. Come look something up. The dictionary’s free, and you can see whether the loop suits you before paying for anything.