Keystone Correction vs タテ帳
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.
タテ帳
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気軽に使える縦書きのメモ帳です。 シンプルなUIにこだわっています。 このアプリは雑誌「偏向」の企画として作成されました。
Screenshots
Verdict
The clearest difference is update cadence: Keystone Correction at every 2 months against タテ帳's every 4 months. Keystone Correction also leads on iOS requirement (11.0 vs 14.0). On price, ads, in-app purchases and device support 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. Neither carries in-app purchases, so what you see is what you pay.
Keystone Correction ships an update every 2 months, タテ帳 every 4 months. The most recent releases landed on October 20, 2026 and October 27, 2026 respectively.
| Parameter | Keystone Correction | タテ帳 |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (5 ratings) — better | — |
| Positive reviews | 66.7% of reviews | — |
| Number of ratings | 5 — better | — |
| Update frequency | Every 2 months — better | Every 4 months |
| Ads | Yes | Yes |
| In-app purchases | No | No |
| Monetization | Ad-supported | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 11.0 — better | 14.0 |
| Further details — not scored | ||
| Size | 19 MB | 26 MB |
| Age rating | 4+ | 4+ |
| Developer | Masayoshi Shibata | Takehiro Ichimnura |
In-app purchases
Keystone Correction
No in-app purchases
タテ帳
No in-app purchases
