This app was mentioned in 3 comments, with an average of 1.00 upvote
dFolio
Photo gallery for Dropbox
Others:
FlickFolio for Flickr
gFolio for Google Drive
pFolio for Google Photos and Picasa
SkyFolio for OneDrive
ShutterFolio for Shutterfly
Here are pictures. https://play.google.com/store/apps/details?id=com.snapwood.dropfolio&hl=en_US&gl=US
Thanks.