# Keystone Correction - ComCam — auto-correction scanner app

> Secure, free mobile scanner with automatic document correction. (iPhone/iPad app by Masayoshi Shibata.)

- Source: https://appshunter.io/ios/app/keystone-correction-comcam/id1504346555 (this page in markdown: same URL + `.md`)
- Developer: [Masayoshi Shibata](https://appshunter.io/developer/1474388626)
- Category: Utilities, Productivity
- Price: Free
- Rating: 5.00/5 from 5 App Store ratings · 3 written reviews indexed
- Age rating: 4+
- Requires: iOS 11.0 · 19 MB
- Languages: English, Japanese
- Released: 2020-03-31
- Data updated: 2026-06-05
- Monetization: ad-supported
- User reviews in markdown: https://appshunter.io/ios/app/keystone-correction-comcam/id1504346555/reviews.md

## What is Keystone Correction?

* [Easy] scan and auto-correction
* [Secure] don't upload images to the Internet.
* [Free] free  for all functions.

Comcam is a simple, secure, and powerful scanner App 

## how to use
Step 1: Take a photo or load an existing photo
Step2. cut out the part you want
Step3. save to a photo app or share to another app

## features
- Since the captured images are not uploaded to the Internet, you can be used for business without worrying about security.
- Paper documents can be easily digitized, making it possible to go paperless with little effort.
- There are no complicated functions, so anyone can use it easily.
- Use all features for free.
- No user registration required.
- No need to upload images to the Internet.

## Key features

- Automatic keystone correction
- Secure offline processing
- Easy document digitization
- Free to use all functions
- No user registration
- Simple interface

## Recent user reviews (3 of 3)

All indexed reviews: https://appshunter.io/ios/app/keystone-correction-comcam/id1504346555/reviews.md

### 5/5 — シンプルでよい

*2026-03-24, version 1.8*

操作がシンプルで良いです。無料で使える事に感謝申し上げます。

### 5/5 — この機能いい

*2021-09-16, version 1.6*

写真の歪み補正に無駄を省いた最高のアプリ
サイズの指定も簡単に出来てスキャナーアプリのように歪み補正しながら切り取りするアプリ

### 3/5 — 素晴らしい

*2020-10-31, version 1.4*

良いアプリです

## Frequently asked questions about Keystone Correction

### Does Keystone Correction have ads?

Yes, Keystone Correction contains advertisements. This is common for free utility applications that offer their full functionality without a purchase.

### Is Keystone Correction free to use?

Yes, Keystone Correction is free for all functions. The app is available at no cost for users to scan and correct documents.

### What devices support Keystone Correction?

Keystone Correction supports iPhone, iPad, and iPod devices. It is designed for iOS users looking for a mobile scanning solution.

### How often is Keystone Correction updated?

The latest version of Keystone Correction is 1.8, last updated on October 1, 2022. Updates ensure the app remains functional and secure.

### Is Keystone Correction safe for business documents?

Yes, Keystone Correction is secure for business documents as captured images are not uploaded to the internet. This privacy feature allows for worry-free use with sensitive information.

### What is the age rating for Keystone Correction?

Keystone Correction has an age rating of 4+. This indicates it is suitable for general audiences and children.

### How does Keystone Correction compare to other scanners?

Keystone Correction offers a simple, secure, and free scanning experience with auto-correction, prioritizing offline processing unlike many cloud-based alternatives.

### Do I need to register to use Keystone Correction?

No, user registration is not required to use Keystone Correction. You can start scanning and correcting documents immediately after installation.

## Version history (last 5 releases)

### 1.8 — 2022-10-01

Supported iPad

### 1.7 — 2021-10-29

- minor bug fix

### 1.6 — 2021-06-17

- minor bug fix

### 1.5 — 2021-06-02

- fix minor bugs

### 1.4 — 2020-08-09

- fix minor bugs
- remove some ads that impair operability

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## More apps by Masayoshi Shibata

- [こんさが](https://appshunter.io/ios/app/id1535894717)
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All apps by Masayoshi Shibata: https://appshunter.io/developer/1474388626

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*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 2026-06-05.*