Keystone Correction vs Otayori Pocket
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Keystone Correction
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.
- Automatic keystone correction
- Secure offline processing
- Easy document digitization
- Free to use all functions
- No user registration
- Simple interface
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* [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.
Otayori Pocket
Organize school handouts and important documents in one place. Scan physical papers or save digital files from communication apps. Easily manage information for multiple children and access it offline.
- Scan and photograph physical handouts
- Save digital handouts from communication apps
- Organize handouts for multiple children
- Offline access to registered handouts
- Tagging for easy searching
- Share handouts with others
- Automatic deletion of overdue data
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■■ Easy registration in as few as four steps ■■ ■■ Hand-delivered handouts as well as handouts delivered by the contact app can be registered ■■ ■■ View your messages comfortably while on the go ■■ Otayori Pocket is an application that allows you to organize handouts distributed by various means in one place. Hand-delivered handouts can be scanned or captured with a camera, while handouts distributed via communication apps can be saved and used in the Otayori Pocket. Even if brothers and sisters attend different schools or preschools and distribute handouts in different ways, they can be grouped together in the Otayori Pocket for easy management. ■Handouts distributed by hand Handouts that are handed out can be scanned and photographed with a camera and registered. You can also register photos that have already been taken. ■Handouts distributed via contact apps, etc. Handouts distributed through contact applications, etc., will be used by saving the data (PDF and images) in the Otayori Pocket. *The data formats that can be saved are PDF, JPEG, and PNG. *To save data to Otayori Pocket, use the sharing function of the standard application. (The sharing function of some apps is also supported.) ■View your messages comfortably while on the go Registered handouts are stored in the device itself as Otayori data, reducing the loading time and making it a fraction of the time it takes to display them. Even in areas with poor reception, you can rest assured that the Otayori data will be displayed immediately. ■Register members To register a family member or child, all you need to do is enter their name and select a color. The name can be a nickname or something similar, so there is no need to enter any personal information. ■Tags By tagging the handouts with relevant tags, the search function can easily find the handouts. ■Sharing of handouts Handouts registered in Otayori Pocket can be shared using a messaging application or AirDrop. You can also send the handouts to your friends who have lost them. *Only PDFs and images can be shared. ■About Data - All data is stored in the device (iPhone) itself, which helps to protect your privacy. - The data stored in the device itself will be backed up together with the device when it is backed up. (If you are backing up to iCloud, you need to make this app a target for backup in the Settings app.) - In order not to overwhelm the storage capacity of the device itself, the function of automatic deletion of overdue Otayori data is provided. (The period of time between the expiration date and the automatic deletion can be set.) ■Others - Star By attaching a star to a handout, you can make sure that the Otayori data will not be automatically deleted. - Notes The Otayori data comes with a memo function that allows you to record notes about the handout. - Auxiliary arrow Auxiliary arrow is displayed on the scan camera screen to prevent shooting mistakes regarding the shooting direction. [Disclaimer] Your use of the app is at your own risk. We pay close attention to the application to be provided, but the app is provided "as is basis" without any warranty of any kind. We assume no responsibility for any result caused by using the application. [Font license] ・Rounded Mgen+ 「Rounded Mgen+」(http://jikasei.me/font/mgenplus/) Licensed under SIL Open Font License 1.1 (http://scripts.sil.org/OFL) © 2015 自家製フォント工房, © 2014, 2015 Adobe Systems Incorporated, © 2015 M+ FONTS PROJECT
Screenshots
Verdict
The clearest difference is in-app purchases: Keystone Correction at none against Otayori Pocket's 1. Keystone Correction also leads on ratings volume (5 vs 1) and iOS requirement (11.0 vs 13.0). On price, rating, review sentiment and update cadence 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. Otayori Pocket sells 1 one-off in-app purchase. Keystone Correction asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 5.0 for Keystone Correction against 5.0 for Otayori Pocket. That said, the two scores are not equally well evidenced: Keystone Correction has 5 ratings behind it against 1, so its average is the more settled of the two. Written reviews are what separate them: 67% of Keystone Correction's written reviews are positive against 70% of Otayori Pocket's.
Keystone Correction ships an update every 2 months, Otayori Pocket every 3 months. Both last shipped on November 3, 2026.
| Parameter | Keystone Correction | Otayori Pocket |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (5 ratings) | 5.0 (1 ratings) |
| Positive reviews | 66.7% of reviews | 69.8% of reviews — better |
| Number of ratings | 5 — better | 1 |
| Update frequency | Every 2 months — better | Every 3 months |
| Ads | Yes | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Ad-supported — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 11.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 19 MB | 55 MB |
| Age rating | 4+ | 4+ |
| Developer | Masayoshi Shibata | sky-nexus Inc. |
Customer experience
Keystone Correction
Otayori Pocket
In-app purchases
Keystone Correction
No in-app purchases
Otayori Pocket
- Hide ads / Add member colors$2.99









