The @Market app compiles all of the photos taken into Albums within the iPhone's standard Photo app
Once inside of the Photos app at the bottom, tap Albums and scroll over and notice your showrooms categorized into different Albums.
Take advantage of the Photos app features by tapping the 3 dots at the top right to create slideshows, movies, or share photos to other apps.
Please note any photos deleted from the Photos app, will delete them permanently.
A full guide to Photos app from Apple, can be found here.