SousyoConverter byNSDev vs KotenOCR
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SousyoConverter byNSDev
Convert Kanji characters into cursive script using a brush font. Customize text size, placement, and ratios for unique calligraphy. Request features and provide feedback for future updates.
- Kanji to cursive script conversion
- Brush font style
- Adjustable text size
- Customizable placement
- Ratio adjustment
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How to use Enter the Kanji characters. Cursive script is displayed. Function Text size can be changed. You can select the placement in the left-right and top-bottom. You can change the ratio of left and right. Please post your request reviews. It corresponds as much as possible. Sousyo letters are those that were created using the Kouzan brush font cursive. http://opentype.jp/kouzansousho.htm
KotenOCR
This application uses AI to convert classical Japanese cursive script (kuzushiji) into digital text. Simply take a photo of the script, and the app will automatically recognize and convert it. All processing is done on-device, supporting over 7,000 characters and optimized for historical documents.
- Photo to text conversion
- AI-powered kuzushiji recognition
- On-device processing
- Copy and share text
- Supports 7,000+ characters
- Optimized for historical documents
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An OCR app that reads classical Japanese cursive script (kuzushiji) using AI. Features: - Just take a photo to convert kuzushiji to text - Powered by the National Diet Library's AI model (NDL Koten OCR-Lite) - All processing runs on-device (no internet connection required) - Copy and share recognized text How to Use: 1. Capture a page with the camera or select from your photo library 2. AI automatically detects text regions and recognizes kuzushiji 3. Tap results to review, copy and use Supports over 7,000 kanji, hiragana, and katakana characters. Optimized for Edo-period woodblock prints and manuscripts. Licenses: - OCR Model: NDL Koten OCR-Lite (National Diet Library, CC-BY-4.0) - Inference Engine: ONNX Runtime (Microsoft, MIT License) Source code: https://github.com/nakamura196/koten-ocr-ios
Screenshots
Verdict
The clearest difference is review sentiment: SousyoConverter byNSDev at 80% against KotenOCR's 0%. SousyoConverter byNSDev also leads on in-app purchases (none vs 3) and iOS requirement (12.0 vs 16.0). KotenOCR's advantage is update cadence (daily vs every 2 months). On price, ads 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
Both are free to download. KotenOCR sells 3 one-off in-app purchases. SousyoConverter byNSDev asks for nothing beyond the download.
SousyoConverter byNSDev ships an update every 2 months, KotenOCR daily. The most recent releases landed on October 9, 2026 and October 13, 2026 respectively.
| Parameter | SousyoConverter byNSDev | KotenOCR |
|---|---|---|
| Price | Free | Free |
| Rating | — | 3.0 (2 ratings) — better |
| Positive reviews | 80.0% of reviews — better | 0.0% of reviews |
| Number of ratings | — | 2 — better |
| Update frequency | Every 2 months | Daily — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 12.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 17 MB | 247 MB |
| Age rating | 4+ | 4+ |
| Developer | NIHON SYSTEM DEVELOPER CORPORATION | Satoru Nakamura |
Customer experience
SousyoConverter byNSDev
KotenOCR
In-app purchases
SousyoConverter byNSDev
No in-app purchases
KotenOCR
- Small Tip$0.99
- Medium Tip$2.99
- Large Tip$6.99
