Definition:
Pleco is a Chinese dictionary and language learning application for iOS and Android, created by Pleco Software and first released in 2000. It is built around an extensible dictionary platform: the base app is free and includes a core Chinese-English dictionary, but users can purchase additional dictionaries (including Oxford, ABC, CC-CEDICT, and Cantonese references), a spaced repetition flashcard module, a full-document reader with tap-to-look-up functionality, and an OCR camera tool that identifies characters through the phone’s camera in real time. Pleco is almost universally recommended as the first tool any serious Mandarin or Cantonese learner should install.
In-Depth Explanation
Pleco’s strength is its architecture. Rather than committing users to one dictionary, it functions as a platform that aggregates multiple reference works into a single unified interface. A lookup returns results from every installed dictionary simultaneously, displayed in a stack — allowing a learner to see the concise CC-CEDICT definition, the detailed ABC Comprehensive Dictionary entry, and a specialized HSK dictionary entry side by side.
Core Free Features
- CC-CEDICT dictionary — community-maintained Chinese-English dictionary with over 120,000 entries; covers simplified and traditional characters
- Pinyin and zhuyin — all entries display full pinyin romanization with tone marks; toggle to zhuyin (bopomofo) for Taiwan-focused learners
- Stroke order diagrams — animated stroke order for every character
- Handwriting input — draw a character on screen to search by shape when pronunciation is unknown
- Radical/component search — decompose characters by their radical or component elements
- Clipboard reader — paste any Chinese text and tap words for instant lookups without leaving the app
Paid Add-Ons
| Add-on | Description |
|---|---|
| ABC Chinese-English Comprehensive Dictionary | Academic-grade reference with detailed grammatical notes and usage examples |
| Oxford Chinese Dictionary | Widely used bilingual reference with British English definitions |
| Cantonese dictionaries | Jyutping-based Cantonese reference works |
| Flashcard system | Full spaced repetition module with SRS scheduling |
| Document reader | Upload text documents; tap any word for definition within the document |
| OCR add-on | Point the camera at printed or handwritten Chinese text; tap characters to look them up |
| Stroke order add-on | High-quality animated stroke order diagrams for all characters |
The flashcard system is particularly notable: it integrates directly with dictionary lookups — save any word from a lookup as a flashcard instantly — and supports custom card templates, audio, example sentences, and full SRS scheduling.
Simplified vs. Traditional
Pleco handles both simplified and traditional Chinese natively. Every character entry shows both forms. The app can be configured to default to either system, and dictionary entries show which form is standard in mainland China (PRC) vs. Taiwan.
Cantonese Support
While Pleco is primarily associated with Mandarin learning, it has substantial Cantonese support through its Cantonese dictionary add-ons (including the CantoDict and Sheik Cantonese-English dictionaries), jyutping romanization display, and Cantonese-specific pronunciation audio. Cantonese learners regard Pleco as the primary reference tool for the language.
History
- 2000: Mike Love founds Pleco Software and releases an early version for Palm OS handhelds — predating smartphones.
- 2009–2010: Pleco is rewritten for iPhone (iOS) following the App Store launch; Android version follows shortly after.
- 2010s: Modular add-on system developed; major dictionary publishers license their content for the platform; flashcard and document reader modules added.
- 2014: OCR (optical character recognition) camera lookup added — a significant advancement for learners reading signs, menus, and physical texts.
- Ongoing: Pleco continues active development; among the longest-running continuously developed mobile language tools.
Common Misconceptions
“Pleco is only for beginners.”
Pleco is used heavily by advanced learners, translators, and academics. The paid dictionary add-ons — particularly the ABC Comprehensive Dictionary and specialized technical glossaries — provide reference-grade depth that goes far beyond what beginners need. Many professional translators keep Pleco as their primary lookup tool.
“The free version isn’t useful.”
The free version includes CC-CEDICT (120,000+ entries), full pinyin/stroke order/handwriting input, and radical search. For most learners at beginner to intermediate level, the free version is sufficient for years of study. The paid add-ons become valuable as learners advance and need more nuanced dictionary information.
Social Media Sentiment
- r/ChineseLanguage: Pleco is consistently recommended in every “what tools do I need” thread. The phrase “just get Pleco” is a community shorthand for any question about Chinese dictionaries. The free version is considered better than any paid alternative.
- r/LearnChinese: Strong consensus that Pleco + Anki covers most vocabulary needs at any level.
- X/Twitter: Chinese learning community posts occasionally note the OCR feature as one of the most practically useful tools for navigating real-world Chinese environments (menus, signs, documents).
Last updated: 2026-04
Related Terms
Research
- Barcroft, J. (2004). Second language vocabulary acquisition: A lexical input processing approach. Foreign Language Annals, 37(2), 200–208.
Summary: Establishes that vocabulary acquisition benefits from meaningful, contextualized input — the theoretical basis for dictionary tools that provide example sentences alongside definitions.
- Nation, I.S.P. (2001). Learning Vocabulary in Another Language. Cambridge University Press.
Summary: Nation’s framework for deliberate vocabulary learning underpins the value of dictionary-integrated flashcard systems like Pleco’s add-on SRS module.