QR Reader：QR Code Reader vs iam QR Code Scanner

FEATURES - Batch Scan - Scan history - Folders to stay organized - Scan all types of QR codes - QR Code detailed data cards - Safe all codes in your history - Save, export and share all barcodes - Scan, read, generate QR & Barcodes - Browse products and compare prices - Share using E-mail, IMessage, Facebook or Twitter - Link photos, LinkedIn, Youtube, App Store or Paypal - Read Websites, Contacts, Messages, Locations, Phone numbers, E-mails, Texts - Scan more types:QR Code, Barcode, Datamatrix, Code128, Code39,Code93, EAN-8, EAN-13 etc. SUBSCRIPTIONS - You can subscribe for PRO account with unlimited scans, products infos and no ads - Subscription options are: 1 week (3 days trial), 1 year or 1 month - Subscription automatically renews for the same price and duration period as the original package unless auto-renew is turned off at least 24-hours before the end of the current period - Payment will be charged to iTunes Account at confirmation of purchase - Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase - Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable https://sites.google.com/view/appqr/qrcode/agreement https://sites.google.com/view/appqr/qrcode/privacy

The app can be used for giveaways or promotions where you only want one scan per person. If a duplicate scan happens within a set time period the app will notify you of this.