CouponScan is a free iPhone app developed by YINGKUI SHEN that allows users to scan and decode coupons using their device's auto-focus camera. With support for various barcode types, including Databar-Exp, UPC-A/EAN-13, GS1-128, and CODE-39/CODE-128/I2/5, CouponScan provides a comprehensive solution for coupon enthusiasts.

The main features of CouponScan include the ability to scan coupon barcodes and view detailed information such as encoded data, human-readable descriptions, manufacture ID/company prefix, item family code, offer code, save value, purchase requirement, start date, expiry date, additional purchase rules, and more. Users can also keep track of all the coupons they have scanned and set sound effects for successful scans.

CouponScan is a universal app that can be used on both iPhone and iPad devices. It supports Retina display for a crisp and clear scanning experience. Additionally, expired records can be automatically deleted after a specified number of days.

To ensure successful scanning, users are advised to have a device with auto-focus camera, ample lighting, and maintain a distance of 3 to 6 inches between the camera and the coupon. Waiting for autofocus to finish and holding still during the barcode scanning process also contribute to accurate results.

With CouponScan, users can conveniently scan and decode coupons, making their shopping experience more efficient and enjoyable.