Scan barcodes on products, or Data Matrix and QR Codes containing URLs, contact info, etc. Note that this app can no longer be updated on Google Play, and there will be no further releases. Almost every question and negative review comment is addressed by one of the following. Please save everyone time by reading these first: Nobody is stealing your information. The app allows you to share contacts, apps, and bookmarks in a QR Code. This is why contacts permissions are needed. See "Visit Developer Website" below ( https://github.com/zxing/zxing/wiki/Frequently-Asked-Questions ). If your device is not scanning, first try workarounds for device bugs in Settings. Enable all of them, and then try disabling one at a time to determine which is necessary. If this does not help, try clearing the device cache and settings from Android settings. This app has never had advertisements, and never will. If you are seeing ads, it's from 3rd party malware, that among other things, is also review-bombing this app with claims of adware. This is entirely false.