# TraceSousyo byNSDev vs KotenOCR

The clearest difference is in-app purchases: TraceSousyo byNSDev at none against KotenOCR's 3. TraceSousyo byNSDev also leads on iOS requirement (12.0 vs 16.0). KotenOCR's advantage is update cadence (daily vs every 24 months). On price, ads and device support there is nothing between them.

Both are free to download. KotenOCR sells 3 one-off in-app purchases. TraceSousyo byNSDev asks for nothing beyond the download.

TraceSousyo byNSDev ships an update every 24 months, KotenOCR daily. The most recent releases landed on October 4, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | TraceSousyo byNSDev | KotenOCR |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.0 (2 ratings)](https://appshunter.io/ios/app/kotenocr/id6760045646/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 24 months | **Daily** |
| Monetization | — | Free with in-app purchases |
| Size | 17 MB | 247 MB |
| Requires iOS | **12.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [NIHON SYSTEM DEVELOPER CORPORATION](https://appshunter.io/developer/1198103734) | [Satoru Nakamura](https://appshunter.io/developer/1841530905) |

## What reviewers say

### TraceSousyo byNSDev

[App page](https://appshunter.io/ios/app/tracesousyo-bynsdev/id1252624354)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### KotenOCR

[App page](https://appshunter.io/ios/app/kotenocr/id6760045646)

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 All processing is done on-device, supporting over 7,000 characters and optimized for historical documents.

**Highlights:** Photo to text conversion, AI-powered kuzushiji recognition, On-device processing, Copy and share text, Supports 7,000+ characters, Optimized for historical documents

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Small Tip | $0.99 | one-time |
| Medium Tip | $2.99 | one-time |
| Large Tip | $6.99 | one-time |


## Frequently asked questions

### Is TraceSousyo byNSDev free?

TraceSousyo byNSDev is free to download, with no in-app purchases.

### Is KotenOCR free?

KotenOCR is free to download, with in-app purchases available.

### Do TraceSousyo byNSDev or KotenOCR have ads?

Neither TraceSousyo byNSDev nor KotenOCR shows ads.

### Which is updated more often, TraceSousyo byNSDev or KotenOCR?

TraceSousyo byNSDev ships an update every 24 months, and KotenOCR daily. Most recently, TraceSousyo byNSDev was updated on October 4, 2026 and KotenOCR on October 13, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*