Useful QR Code Reader vs Septendecuple Calc
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
Useful QR Code Reader
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A convenient QR Code Reader app has been released! This app is an easy, simple, and fast QR code reading application. Additionally, it is a handy QR code reader app that records your scan history. After launching the app, grant camera access, hold your device over a QR code, and scan it. The scanned QR code will be displayed at the top of the main screen. Tap it to open the browser and view the URL, or long-press to copy it to the clipboard and use the text as needed. After launching, tap the "Load Image" button and grant access to your photo library. Then, load an image containing a QR code, such as a screenshot, and the app will scan the QR code within the image. (In some cases, it may fail to read due to errors.) It's free, so feel free to use it! A paid version without ads (PRO version) is also available! [How to Use] - Point the camera at a QR code on the initial screen to scan it. - The top right button on the screen transitions to the main screen but skips QR code scanning. - The top left button on the screen scans a QR code from an image in the photo library. - The scanned content is displayed at the top of the main screen. - Tap to open the browser. - Long-press to copy to the clipboard. - QR code scan history is displayed at the bottom of the screen. - Delete all history with "Delete All History." - You can delete history individually. - Tapping on history entries also opens the browser. - Long-pressing history entries copies them to the clipboard. - Tap the "I" in the top right to view information about the app. - Use the back arrow in the top left to return to the initial QR code scanning screen. That's how to use the app. It is a simple, convenient, and fast QR code reading app! Download and try it today!
Septendecuple Calc
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Display 11 calculators and perform calculations with each one.
Screenshots
Verdict
The clearest difference is update cadence: Useful QR Code Reader at weekly against Septendecuple Calc's every 2 weeks. On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Useful QR Code Reader ships an update weekly, Septendecuple Calc every 2 weeks. The most recent releases landed on September 19, 2026 and August 3, 2026 respectively.
| Parameter | Useful QR Code Reader | Septendecuple Calc |
|---|---|---|
| Price | Free | Free |
| Update frequency | Weekly β better | Every 2 weeks |
| Ads | Yes | Yes |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.6 β better | 15.8.3 |
| Further details β not scored | ||
| Size | 99 MB | 36 MB |
| Age rating | 4+ | 4+ |
| Developer | katapu.net | Hideaki Uchikoshi |
In-app purchases
Useful QR Code Reader
No in-app purchases
Septendecuple Calc
No in-app purchases






