Tangoo is a Japanese dictionary and learning application for Android, developed by Daniel Ruminski. It combines an offline Japanese-English dictionary with grammar reference, spaced repetition flashcards, and a library of graded reading material.
In-Depth Explanation
Platform: Google Play (com.danielruminski.tangoo). As of early 2026, Tangoo had over 100,000 downloads and a 4.3-star rating (526 reviews) on Google Play. An iOS version was not available in the App Store as of the time of writing; the domain tangoo.app was not active as of May 2026.
Tangoo’s dictionary covers 200,000+ words and phrases, searchable by kana, kanji, or romaji. Each entry includes meanings, example sentences, pitch accent information, and audio. The app supports full-text search and recognition of conjugated verb forms. Kanji that cannot be typed can be looked up by drawing them via the app’s handwriting recognition feature.
The grammar section covers 640+ JLPT grammar points from N5 to N1, each with clear explanations and over 5,000 total example sentences, organized by JLPT level and searchable by keyword.
Tangoo includes a library of over 100 Japanese short stories and articles covering a range of difficulty levels, from beginner stories to advanced texts on Japanese culture, history, and daily life. Words within stories can be tapped for instant dictionary lookup — a feature sometimes called “reader mode” in similar applications.
The flashcard system supports custom word lists and pre-made lists, with SRS (spaced repetition scheduling) applied to vocabulary, grammar, kanji, or mixed review sessions. A clipboard reader function displays pop-up translations when Japanese text is copied from other apps.
All features are described by the developer as available offline.
Social Media Sentiment
Tangoo has limited visibility in English-language Japanese-learning communities such as r/LearnJapanese and r/ajatt as of early 2026, consistent with its current install base of around 100,000 downloads. App store reviews are generally positive, with users noting the offline functionality and the grammar point library. No significant critical controversy was observed in available public discussion.
Last updated: 2026-05
Related Terms
See Also
Research
- Ruminski, D. (n.d.). Tangoo — Japanese Dictionary [Mobile application]. Google Play (com.danielruminski.tangoo). https://play.google.com/store/apps/details?id=com.danielruminski.tangoo
Summary: Primary source for all app-specific details in this entry, including developer (Daniel Ruminski), feature set (200,000+ dictionary, 640+ JLPT grammar points, 100+ short stories, SRS flashcards, fully offline, no ads), download count (100,000+), and rating (4.3 stars). Verified May 2026.
- Ebbinghaus, H. (1885). Über das Gedächtnis: Untersuchungen zur experimentellen Psychologie. Duncker & Humblot.
Summary: Established the forgetting curve — the empirical observation that memory decays exponentially over time without review. This principle underlies all spaced repetition systems, including the SRS flashcard scheduling in Tangoo.
- Cepeda, N. J., Pashler, H., Vul, E., Wixted, J. T., & Rohrer, D. (2006). Distributed practice in verbal recall tasks: A review and quantitative synthesis. Psychological Bulletin, 132(3), 354–380.
Summary: Meta-analysis of 254 experiments confirming that spacing practice over time substantially improves long-term retention compared to massed study, providing the empirical basis for the spaced repetition scheduling found in vocabulary and flashcard learning tools such as Tangoo.