Adobe's professional image manager on your iPad
Adobe Lightroom is a popular professional photo management photo tool that's available for Windows, Mac and iOS.
For professionals, one of the biggest draws of Adobe Lightroom is that it allows you to edit RAW image files on your Mac with no need to convert to another format. Adobe Lightroom syncs your collection and edits with the desktop version so you can edit on the move.
Although you can download Adobe Lightroom for free, you will need an Adobe Creative Cloud account to use it.