CKC OCR vs K3學中文 (寫字認字)
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CKC OCR
This educational tool helps users search for CKC codes and learn Chinese characters. It explains the appearance-based coding system, which encodes characters based on the stroke features of their four corners.
- 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
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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).
K3學中文 (寫字認字)
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This learning App is divided into two parts, a learning chapter and a game chapter. There are 24 categories for learning, including face, body, family, color, shape, occupation, food, transportation, animals, nature, fruits, insects, stationery, clothing, places, sports, festivals, environmental protection, etc. Children learn the strokes, writing and pronunciation of related words. The game section tests the children’s ability to recognize words.
Screenshots
Verdict
The clearest difference is price: CKC OCR at Free against K3學中文 (寫字認字)'s $7.99. CKC OCR also leads on update cadence (fortnightly vs every 9 months). K3學中文 (寫字認字)'s advantage is iOS requirement (9.0 vs 15.6). On ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
CKC OCR is free to download; K3學中文 (寫字認字) costs $7.99 up front. Neither carries in-app purchases, so what you see is what you pay.
CKC OCR ships an update fortnightly, K3學中文 (寫字認字) every 9 months. The most recent releases landed on October 4, 2026 and October 3, 2026 respectively.
| Parameter | CKC OCR | K3學中文 (寫字認字) |
|---|---|---|
| Price | Free — better | $7.99 |
| Rating | 3.3 (3 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 3 — better | — |
| Update frequency | Fortnightly — better | Every 9 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 9.0 — better |
| Further details — not scored | ||
| Size | 2 MB | 362 MB |
| Age rating | 4+ | 4+ |
| Developer | Ka Ho Tse | Yiu Ying Ching |
In-app purchases
CKC OCR
No in-app purchases
K3學中文 (寫字認字)
No in-app purchases









