Comparison

Keystone Correction vs Otayori Pocket

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Automatic keystone correction
  • Secure offline processing
  • Easy document digitization
  • Free to use all functions
  • No user registration
  • Simple interface
Read full description

* [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.

About

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.

Highlights
  • 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
Read full description

■■ 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

Keystone Correction4 screens
Otayori Pocket4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Otayori Pocket sells 1 one-off in-app purchase. Keystone Correction asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

Keystone Correction ships an update every 2 months, Otayori Pocket every 3 months. Both last shipped on November 3, 2026.

Scorecard4 real differences · 6 level
Keystone Correction versus Otayori Pocket: the parameters behind the verdict, then further details
ParameterKeystone CorrectionOtayori Pocket
PriceFreeFree
Rating5.0 (5 ratings)5.0 (1 ratings)
Positive reviews66.7% of reviews69.8% of reviews — better
Number of ratings5 — better1
Update frequencyEvery 2 months — betterEvery 3 months
AdsYesYes
In-app purchasesNo — betterYes
MonetizationAd-supported — betterFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS11.0 — better13.0
Further details — not scored
Size19 MB55 MB
Age rating4+4+
DeveloperMasayoshi Shibatasky-nexus Inc.

Customer experience

Keystone Correction

All ratings5 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive66.7%
Neutral33.3%
Negative0.0%

Otayori Pocket

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews53 reviews
Positive69.8%
Neutral24.5%
Negative5.7%

In-app purchases

None

Keystone Correction

No in-app purchases

1 purchases

Otayori Pocket

One-time1
  • Hide ads / Add member colors$2.99

Questions

Is Keystone Correction free?
Keystone Correction is free to download, with no in-app purchases.
Is Otayori Pocket free?
Otayori Pocket is free to download, with in-app purchases available.
Which has better reviews, Keystone Correction or Otayori Pocket?
Keystone Correction and Otayori Pocket are both rated 5.0 out of 5 on the App Store, from 5 and 1 ratings respectively.
Do Keystone Correction or Otayori Pocket have ads?
Both Keystone Correction and Otayori Pocket show ads.
Which is updated more often, Keystone Correction or Otayori Pocket?
Keystone Correction ships an update every 2 months, and Otayori Pocket every 3 months. Most recently, Keystone Correction was updated on November 3, 2026 and Otayori Pocket on November 3, 2026.

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