To get 20 FREE 4×6 Photo Prints at Walgreens enter your email to get a coupon code by email. Then download the printicular app for iOS , Android , Windows phone , or other platforms . Open the app, upload your photos and select pickup from Walgreens, and enter your coupon code to get 20 free 4×6 prints with free in store pickup. To get your coupon code for 20 free 4×6″ prints at Walgreens, enter your email address. Your code will be emailed to you. To redeem your Groupon offer, enter your coupon code in the app. Tap ‘I have a coupon’ on the ‘Place Your Order’ screen.