QR コードリーダー / きゅーあーるこーど読み取り・生成 vs Error Note

The definitive QR code scanner app — ranked #1 among the most-used apps! This is a reliable Japan-made app, developed in strict compliance with the usage guidelines (the terms for a non-exclusive trademark license) set by DENSO WAVE Incorporated, the trademark holder of QR Code. * Non-exclusive trademark license agreement with DENSO WAVE Incorporated: No. 4075066: Class 9 No. 6181403: Class 9, Class 35 No. 6181404: Class 9, Class 35 In recent updates, we've been actively adding new features to make the app even more convenient! - Added support for iPhone Duo - Added support for widgets, Control Center, and the Share Extension - You can now scan multiple QR codes at once - Added Yahoo! Shopping and Mercari to product barcode search - You can now add history items to your favorites [Just launch and point] 1. Scanning starts the moment you open the app! 2. Simply point your screen at a QR code! Also fully equipped with scan history and a flashlight feature! You can even read QR codes from images saved in your camera roll! All features in this app are available for free! [Feature list] - Autofocus - Tap the screen to adjust focus - Support for "Sign in with a passkey" QR codes - Support for Wi-Fi connection QR codes - Scan history - Flashlight feature - Read QR codes from camera roll images - Change the app icon - Automatically detects which apps can be launched based on the scanned content - Scan product barcodes to search for items on shopping sites - QR code creation - Widgets, Share Extension, and Control Center If prompted for camera access on launch, please allow it. If a camera launch error appears, go to "Settings" > "Privacy" > "Camera" on your iPhone and enable access for "QR Code." [Supported barcodes] Codabar, Code 39, Code 39 mod 43, Code 93, Code 128, EAN-8, EAN-13, GS1 DataBar, GS1 DataBar Expanded, GS1 DataBar Limited, Interleaved 2 of 5 (ITF), ITF14, UPC-E Aztec, DataMatrix, Micro PDF417, Micro QR, PDF417, QR * Featured in AppBank's "3 Free Apps People Actually Used [July 2018 Edition]" on 2018/08/02 and others * Ranked #1 in AppBank's "[Updated Daily] Top 50 Most-Used Free Apps" on 2016/06/16 and others * Ranked #1 in AppBank's "Weekly Ranking of the Top 50 Most-Used Free Apps" on 2016/06/16 and others * Featured in many other media outlets QR Code is a registered trademark of DENSO WAVE Incorporated.

Error Note — Study Smarter with Your Own Error Notebook Error Note is a simple but powerful tool designed to help students and exam-takers improve faster by reviewing past mistakes. Capture your wrong questions, organize them by subjects, and understand your weak points through clear statistics and structured review tools. Whether you are preparing for exams, learning new subjects, or trying to build better study habits, Error Note helps you focus on what truly matters: learning from your mistakes. Key Features 1. Add Mistakes Easily Record wrong questions using text, photos, or quick notes. Supports multiple subjects such as Mathematics, English, History, and more. 2. Organize by Subject and Topic Create your own subjects or chapters. Group mistakes logically and access them at any time. 3. Smart Review System Tag difficulty levels, set review reminders, and study using spaced repetition. Improve memory efficiently with guided practice. 4. Error Statistics and Weak Point Analysis See which subjects you struggle with the most. Track your progress over time and identify where to focus next. 5. Print Review Sheets Generate printable versions of selected questions, with or without answers. Ideal for exam preparation and offline study. Why Choose Error Note * Focus on mistakes that matter * Learn faster with targeted review * Build strong and consistent study habits * Track improvement clearly over time * Simple, fast, and distraction-free Error Note is a reliable companion for long-term learning and exam preparation. Study less, learn more, and make every mistake count.