# Keystone Correction vs 文字起こし

The clearest difference is review sentiment: 文字起こし at 83% against Keystone Correction's 67%. 文字起こし also leads on update cadence (every 3 weeks vs every 2 months). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Keystone Correction ships an update every 2 months, 文字起こし every 3 weeks. The most recent releases landed on September 16, 2026 and August 15, 2026 respectively.

## The numbers

| Metric | Keystone Correction | 文字起こし |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (5 ratings)](https://appshunter.io/ios/app/keystone-correction-comcam/id1504346555/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 66.7% of reviews | **83.3% of reviews** |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | Ad-supported | Ad-supported |
| Size | 19 MB | 34 MB |
| Requires iOS | **11.0** | 12.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Masayoshi Shibata](https://appshunter.io/developer/1474388626) | [Rikuto Komatsu](https://appshunter.io/developer/1533655565) |

## What reviewers say

### Keystone Correction

[App page](https://appshunter.io/ios/app/keystone-correction-comcam/id1504346555)

Easily scan and auto-correct documents directly on your device. This secure app keeps your images private by not uploading them online, making it ideal for sensitive business use. All functions are available for free, with no registration or complicated steps required.

**Highlights:** Automatic keystone correction, Secure offline processing, Easy document digitization, Free to use all functions, No user registration, Simple interface

**In-app purchases:** none


### 文字起こし

[App page](https://appshunter.io/ios/app/ocr-scan-text/id1603817431)

Extracts text from images using OCR technology. Quickly convert visual information into editable text for easy sharing and editing.

**Highlights:** Image to text extraction, OCR technology, Editable text output, Text sharing, Text editing

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Keystone Correction free?

Keystone Correction is free to download, with no in-app purchases.

### Is 文字起こし free?

文字起こし is free to download, with no in-app purchases.

### Do Keystone Correction or 文字起こし have ads?

Both Keystone Correction and 文字起こし show ads.

### Which is updated more often, Keystone Correction or 文字起こし?

Keystone Correction ships an update every 2 months, and 文字起こし every 3 weeks. Most recently, Keystone Correction was updated on September 16, 2026 and 文字起こし on August 15, 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.*