NihonGO Dominos
Intermediate Japanese, daily
Free
Rapid daily exposure to the building blocks of Japanese. Frequency-ranked. One thumb. For serious intermediate learners. Offline, no accounts.
NihonGO Dominos is built for the intermediate phase of Japanese — the long climb from finishing a beginner course to reading everyday text on your own. A stretch where progress feels slow, and what helps most is rapid, repeated exposure to the building blocks of the language.
—— ONE MECHANIC ——
The whole loop is a domino tile. Tap to peek the back. Hold or double-tap to retire it. One thumb, on the train, every day. Tiles glow bone → amber → orange → vermilion as you cycle through them, and items you actually struggle with land in a Challenge Box for spaced repetition — only where it pays off.
—— THREE PILLARS ——
語彙 Goi (Vocabulary) — 6,363 tiles across eight frequency tiers. Verbs, adjectives, adverbs, nouns, conjunctions, number paradigms. Every entry validated against JMdict. ~98% coverage of everyday text at the top of the pool. 6,926 example sentences, individually composed — every sentence built from words already in the corpus, and every one of them read aloud in a natural Japanese voice. A further 1,373 vocabulary entries ship as lookup cards, each with its own spoken example, so a tapped word in any sentence lands on a real card instead of nothing.
文法 Bunpou (Grammar) — 611 grammar patterns spanning JLPT N5 through N1, hand-curated under sensei supervision. One specific surface form per tile. Cross-checked against established grammar references. ~94–96% coverage in general texts.
漢字 Kanji (Characters) — 2,228 kanji from the JLPT pool unioned with the Kyōiku elementary set, ranked by a blended newspaper-and-encyclopedia frequency score. Each card has the glyph with colored radicals, kun and on readings, English gloss, a hand-written mnemonic, KanjiVG stroke-order animation, and compound examples that link back into Goi. ~95% coverage of everyday reading.
—— TWO REFERENCE SETS ——
部首 Bushu (Radicals) — All 214 Kangxi radicals. Tap any radical to see the kanji that contain it.
仮名 Kana — 232 hiragana, katakana, and extended foreign-sound katakana, organized by row, vowel, and modifier.
—— TILES THAT LINK ——
Over 46,000 tap-to-jump links run through the corpus. In example sentences, follow any tappable word straight to its own card. In Kanji cards, the compound examples link back into Goi. The app is an integrated reading environment, not a stack of separate flashcards.
—— WHAT WE DON'T DO ——
No invented "Lesson 1, Lesson 2" curriculum — order is frequency. Tier 1 is what you'll meet first in real Japanese; Tier 8 is what you'll meet last. (If you'd rather browse by JLPT level, there's a toggle in Settings — same pool, re-bucketed: kanji from N5 all the way to N1 plus a beyond-JLPT set, grammar N5 to N2 with the N1 patterns in the frequency tiers.)
No drowning in SRS queues. The main loop is rapid, repeated exposure by flipping tiles. The Challenge Box is a Leitner-style safety net for items you've genuinely struggled with — not the front door.
No production drills. Recognition is the skill; production follows from input.
No accounts. No tracking. No analytics. No ads. No data collected. No internet required after install.
—— iCLOUD SYNC ——
Your Challenge Box and study progress sync between your iPhone and iPad through your own iCloud account, so you can switch devices and pick up where you left off. The sync runs through Apple. We never see your data.
—— FOR WHOM ——
Built for serious intermediate learners. You can read hiragana and katakana, you've worked through a beginner course, and you want to push from "I can read simple sentences" to "I can read newspapers, novels, blogs, manga."
If you're a true beginner, finish a beginner course first and come back. If you're already comfortable with monolingual Japanese dictionaries, you're past us.
Everyone else — this is the tool we built because we couldn't find it.
THE KANJI CARD, REDESIGNED
The kanji card now reads as one piece: the character sits close under its
readings, the story shows at its full height instead of inside a tiny
scroll box, and a long card scrolls as a whole. On iPad, every card that
opens in the side panel is now exactly the same size, however you opened
it — and in the light theme, a highlighted component keeps the rest of
the character faintly visible around it.
ONE HOME, ONE LOOK
The bottom bar is now identical wherever it appears — including your
progress dashboard being one tap away from every hub screen — and the
light/dark mode follows you everywhere instead of flickering back when
you return a page.
FRESHER CARDS
The card set is updated with months of corrections — refined grammar
explanations, repaired example sentences, and newly recorded audio.
AND UNDER THE HOOD
Updating the app no longer risks showing a stale page from the previous
version, and tapping and holding a tile no longer triggers the iOS text
selection bubble on its neighbour.
The developer, JUERGEN WOLFGANG HAMMER, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- JUERGEN WOLFGANG HAMMER
- Size
- 787.8 MB
- Category
- Education
- Compatibility
Requires iOS 17.6 or later.
- iPhone
Requires iOS 17.6 or later. - iPad
Requires iPadOS 17.6 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Juergen Wolfgang Hammer
