LingoDeer vs Duolingo for Japanese: Which Suits a Child? (2026)

LingoDeer or Duolingo for Japanese? It is the most common fork parents reach, and most comparisons answer it for an adult learner working alone. The answer changes when the learner is nine, or thirteen, and somebody else is paying.

We run an online Japanese school for children growing up outside Japan. We use both, we have written a full review of each, and we checked their current courses, kids products and account rules in September 2026. Here is the comparison as it applies to a child.

The answer in one paragraph

Duolingo wins on habit. LingoDeer wins on understanding. If the problem you are solving is that your child does not practise, choose Duolingo, because it is free, it is relentless, and it is very good at getting somebody to come back tomorrow. If the problem is that your child practises but cannot build a sentence and does not know why the words moved, choose LingoDeer, because it explains. For most families the sequence is Duolingo first, LingoDeer once the questions start.

One thing to settle before either: neither company’s children’s app teaches Japanese. Duolingo ABC teaches English literacy. LingoDeer’s kids app, iDeerKids, for roughly ages 3 to 8, also teaches English. In both cases Japanese lives in the main app, written for older learners.

Side by side, on the things that matter for a child

	Duolingo	LingoDeer
Where Japanese lives	Main app	Main app
The kids app	Duolingo ABC — English literacy	iDeerKids, about 3 to 8 — English
Accounts	Standard accounts from 13; younger with a parent’s consent	Account created by the person subscribing
Cost model	Free with advertising, paid tier optional	Paid subscription, no meaningful free tier
Grammar	Learn by pattern; explanations are light	Explicit explanations before the exercises
Script	Kana taught from the start; kanji arrives gradually	Kana and kanji handled deliberately, with furigana control
What keeps a child coming back	Streaks, leagues, notifications, characters	Comparatively little — motivation must come from the child
Languages included	One subscription, many courses	19 languages, Japanese among the strongest

Where Duolingo is genuinely better

• It is free. For a child who may or may not stick with it, that matters more than any feature.
• It is engineered to be returned to. Streaks and leagues are not a gimmick; they are the reason a nine-year-old opens it on a Tuesday.
• It teaches real script immediately. No long romaji phase, which is the right decision and one many cheaper apps get wrong.
• Everyone else is on it. Classmates and cousins compare streaks, which for some children is the entire motivation.

Where LingoDeer is genuinely better

• It explains before it tests. Particles, verb forms and word order are taught, not inferred. For a child who asks why, this is the difference between progress and frustration.
• It was built for Japanese, Korean and Chinese first. It does not treat Japanese as a European language with different letters.
• Furigana can be controlled. You can keep reading support on for longer, which suits a child reading kanji for the first time.
• No leagues, no pressure. For an anxious or competitive child, the absence of a leaderboard is a feature.

Which one for which child

• Under about 8: neither, really. Both main apps assume a reader. A children’s product such as Dinolingo, or simply hearing Japanese from a person, fits better.
• 8 to 12, starting from zero: Duolingo, with a parent sitting alongside for the first weeks. Free, and the habit is the whole battle.
• 10 and up, already frustrated by sentences: LingoDeer. The explanations are what is missing.
• A heritage child who speaks but cannot read: LingoDeer’s script handling suits this better, though neither app is designed for a child whose listening is far ahead of their reading.
• A teenager who will do neither: the app is not the problem. Something with a person in it is the answer.

What both of them leave out

Comparisons like this one quietly assume the choice matters more than it does. In our experience with children learning Japanese abroad, the app is rarely the reason a child keeps going or gives up.

Both apps are solo. Nobody notices if your child stops. Nobody answers in Japanese. Nothing is scheduled. A child can complete hundreds of exercises and still freeze the first time a Japanese cousin asks them something, because answering a real person is a different skill from choosing the right tile, and it is only learned by doing it.

So: pick whichever of the two fits your child, keep it, and do not agonise. Then add the missing half.

What TOMODACHI JAPAN does

• Same-age friends in Japan. Your child speaks with peers their own age, every week.
• Teachers who work in Japanese schools. Adults whose job is your child’s progress, not an algorithm’s.
• Small classes of 8. Small enough that a quiet child cannot disappear.
• Live lessons on a fixed schedule. Something that lands in the week, rather than something to remember to open.

Keep the streak. Add the people.

Frequently asked questions

Is LingoDeer better than Duolingo for Japanese?

For understanding grammar, yes — LingoDeer explains where Duolingo expects you to infer. For staying with it week after week, Duolingo is better, and for a child that usually matters more. Many families end up using both.

Is LingoDeer free?

LingoDeer is a paid subscription; a limited amount is available before payment. Duolingo’s Japanese course can be used free with advertising. We do not print prices here because they change by country and season — check each company’s own page.

Can a young child use either one?

Both main apps assume a reader, so under about eight they are hard going without an adult beside them. Note that the children’s apps from both companies — Duolingo ABC and iDeerKids — teach English, not Japanese.

Will either get my child to a conversation?

They will build the vocabulary, the script and a lot of the grammar that a conversation needs. They cannot supply the conversation itself, because neither app has anybody in it.

In short

• Duolingo for the habit, LingoDeer for the explanation — and Duolingo first if you are choosing one
• Neither company’s kids app teaches Japanese: Duolingo ABC and iDeerKids both teach English
• Duolingo accounts start at 13, younger with a parent’s consent; LingoDeer is a paid subscription held by the buyer
• Under about 8, a children’s product or a real person fits better than either
• Both are solo — nobody notices if your child stops, and nobody answers in Japanese

Related reading

• Japanese learning apps for kids: which ones actually teach Japanese
• Is Duolingo good for kids learning Japanese?
• LingoDeer for kids: does it actually teach Japanese?
• Dinolingo Japanese review