- For new Amazon Appstore customers only, Amazon.com is offering Facetune for Android with $5 Amazon Credit for FREE when you download the app via the Amazon Underground app. (Follow the instructions on this page to download the Amazon Underground app.) This app allows you to edit and retouch photos; click here for more info. You'll receive the credit 24 to 48 hours after download, and it can be used towards physical goods shipped and sold via Amazon. This offer is valid till 07/15/2016.