QR & Barcode Reader is your go-to app for all things related to QR code and barcode scanning. Whether you're a business professional who needs to handle various code formats or a casual user who occasionally scans codes, this app offers a comprehensive suite of features. With the ability to scan any QR code or barcode to fetch information from well-known services such as Amazon, eBay, and Google, it proves to be a valuable tool for everyday use.

The app supports all common formats, allowing it to handle QR codes, Data Matrix, Aztec, UPC, EAN, Code 39, and more. Not only does it decode information, but it also executes relevant actions like opening URLs, connecting to WiFi hotspots, and adding calendar events, among others. Security isn't compromised as it leverages Chrome Custom Tabs and Google Safe Browsing to protect against malicious links, ensuring your online safety while using the app.

Efficiency and functionality remain a priority with features like minimal permissions requirements, allowing users to scan without unlocking full device access. The app even operates well in low-light situations with a flashlight feature, and you can zoom to read distant codes. Moreover, for the savvy user, it provides CSV export capabilities for managing scan histories, making it a wonderful choice for business settings.

Despite its vast utility, the app isn't without a few drawbacks. Some users have raised concerns about the presence of ads interrupting their experience, and occasional complaints have been made about app stability when performing certain tasks. However, with its minimal space requirement and no-cost availability, the pros often outweigh the cons.

In essence, QR & Barcode Reader provides a potent blend of convenience, security, and versatility for anyone in need of a robust scanning solution. It's designed for a broad user base, from casual to heavy-duty users, and continues to deliver excellent value time and again.