# CKC OCR > Tool to search CKC codes and learn Chinese characters based on stroke features. (iPhone/iPad app by Ka Ho Tse.) - Source: https://appshunter.io/ios/app/ckc-ocr/id1317213774 (this page in markdown: same URL + `.md`) - Developer: [Ka Ho Tse](https://appshunter.io/developer/1317213773) - Category: Education - Price: Free - Rating: 3.30/5 from 3 App Store ratings · 1 written reviews indexed - Age rating: 4+ - Requires: iOS 15.6 · 2 MB - Languages: American English, Japanese, Korean, Chinese (Simplified, China), Chinese (Traditional, Hong Kong SAR China), Vietnamese - Released: 2017-11-29 - Data updated: 2026-06-09 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/ckc-ocr/id1317213774/reviews.md ## What is CKC OCR? CKC OCR (縱橫識字) This tool designed by The Education University of Hong Kong (EdUHK) - CKC Centre for the Development of Information Technology in Chinese Language Teaching. Facilitate to search the CKC Code and learn of Chinese characters. For Example, if you search "為", all combinations for the CKC code (including code for variant Chinese character and instant code) will show: 000, 3, 34 and 3400. CKC Chinese Input method is a type of appearance-based coding system. It encodes a Chinese character according to the stroke features of its 4 corners. The sequence is upper left corner, upper right corner, lower left corner and lower right corner (following the shape of the alphabet “Z”) respectively. The strokes and the features of the Chinese character components are classified into 10 groups, represented by 0 through 9. 0 A left-falling stroke or a stroke with left-turning (丿亅). 1 A horizontal stroke or a horizontal rising stroke written from left to right (丨). 2 A vertical stroke or a left slanting stroke (一). 3 A dot or a right-falling stroke (丶 乀). 4 A cross or the radical of “Grass” (十乂卄). 5 The combination of a falling stroke runs through 2 horizontal strokes (≠ キ). 6 A square (口). 7 A corner, 2 upper corners, 2 lower corners or a stroke with right-turning (乚). 8 The shape of the numeral “Eight”(八) in Chinese or its variants (人丷). 9 The shape of the Chinese character which means “Small” (小), its variants and the radical of “Upright Heart”(忄). ## Key features - Search CKC codes for Chinese characters - Learn Chinese character stroke features - Understand appearance-based coding system - View CKC code combinations - Educational tool for Chinese language teaching ## Recent user reviews (1 of 1) All indexed reviews: https://appshunter.io/ios/app/ckc-ocr/id1317213774/reviews.md ### 5/5 — OCR效果好唔錯！ *2020-09-17* 識別印刷體肯定冇問題嘞，不過手寫體嘅準確率就差啲，要再提高下 ## Frequently asked questions about CKC OCR ### What is CKC OCR? CKC OCR is an educational tool developed by The Education University of Hong Kong to help users search for CKC codes and learn Chinese characters. It utilizes an appearance-based coding system that encodes characters by the stroke features of their four corners. ### How does the CKC coding system work? The CKC Chinese Input method encodes a Chinese character based on the stroke features of its four corners, following an upper-left, upper-right, lower-left, lower-right sequence. Strokes and character components are classified into 10 groups, represented by numbers 0 through 9. ### What kind of information can I find in CKC OCR? When you search for a Chinese character, CKC OCR will display all possible CKC code combinations, including codes for variant Chinese characters and instant codes. For example, searching for '為' shows codes like 000, 3, 34, and 3400. ### Is CKC OCR suitable for beginners? Yes, CKC OCR is designed to facilitate learning Chinese characters and understanding the CKC code system. It breaks down the coding logic by stroke features, making it accessible for those new to the system. ### What devices does CKC OCR support? CKC OCR is available for iPhone, iPad, and iPod devices, making it accessible to a wide range of Apple users. ### How often is CKC OCR updated? The latest version of CKC OCR is 2.7.1, and it was last updated on May 22, 2025. This indicates a recent update, suggesting ongoing development and support. ### What is the age rating for CKC OCR? CKC OCR has an age rating of 4+, making it suitable for a broad audience including younger learners and children. ### Does CKC OCR have ads? No, CKC OCR does not contain advertisements. The app is free to use without any ad interruptions. ## Version history (last 5 releases) ### 2.7.1 — 2025-05-22 - iOS18 bug fixes ### 2.7.0 — 2025-05-15 - iOS18 bug fixes ### 2.6.0 — 2023-02-09 - Improved stability and bug fixes ### 2.5.1 — 2022-07-07 - Added new column: LSHK - Word detail page can easy link to ckcstrokes - Bug fixed - Repair iOS15 ui bug ### 2.5.0 — 2022-07-05 - Added new column: LSHK - Word detail page can easy link to ckcstrokes - Bug fixed ## Apps similar to CKC OCR | App | Rating | Price | Category | | --- | --- | --- | --- | | [教城教師](https://appshunter.io/ios/app/id1664047385) | — | Free | Education | | [樂遊古詩](https://appshunter.io/ios/app/id1659999751) | — | Free | Education | | [EduDX Teacher](https://appshunter.io/ios/app/edudx-teacher/id1297912153) | — | Free | Education | | [童學字咭](https://appshunter.io/ios/app/id1523080001) | — | Free | Education | | [EdU Library](https://appshunter.io/ios/app/edu-library/id1476215607) | — | Free | Education | | [東天之星獎勵計劃](https://appshunter.io/ios/app/id6746546686) | — | Free | Education | ## More apps by Ka Ho Tse - [CKC Pinyin Search](https://appshunter.io/ios/app/ckc-pinyin-search/id1479285608) - [詩賞品德](https://appshunter.io/ios/app/id1600646891) All apps by Ka Ho Tse: https://appshunter.io/developer/1317213773 ## Related topics [ckc ocr](https://appshunter.io/ios/topics/ckc-ocr) · [pop stroke](https://appshunter.io/ios/topics/pop-stroke) · [ckc](https://appshunter.io/ios/topics/ckc) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-09.*