I have been searching for an app that would replace or exceed iPhoto in functionality and performance. Sadly, Apple made some changes to Photos in version iOS 7 and continued with those changes in IOS 8. Though it seems minimal, to a photographer, it is blazingly obvious that you should not have a white background for your photos. Photos should always be presented against a grey to black background. The reason for this is that the observer's eye will respond to the excessive white or bright background-- the pupil will slightly close. This diminishes the experience of the photo, and the colors of the image you wish to see will not be fully appreciated. The developers of Photography software such as Aperture and LightRoom understand this, and the backgrounds behind the photos are always a neutral dark.
Consequently, I was using iPhoto on my iPad, as at least the interface was more conducive to viewing photos than Apples Photos. But when Apply disabled iPhoto for iOS 8, I was left with trying to find a decent substitute.
Photo Shack 2 satisfies some of my needs and more. If you are looking for a good substitute for iPhotos, be sure to check out Photo Shack 2. If offers more organization capability than iPhoto did, and is more powerful in many ways.
It may seem expensive, but when looking exhaustively for a good replacement, it was worth the money to me. I am an amateur photographer, and I like to carry a large selection of my photos with me. I like to be able to search and find anything I want quickly, and display them smartly. Photo Shack has some great Slideshow capabilities as well. Additionally, the AirPlay is a snap, so easily displaying on larger screens is a nice feature. Granted, the learning curve is a bit strong, but there is documentation included in the app, which makes it much easier. My only complaint is that the developers have fallen into the new trend of going with the less obvious icons for that "minimalist" design. I would rather have icons and/or commands that clearly indicate functionality. But that is my gripe with Apple, too.
Photo Shack 2 is now my go-to app for photos. Apple needs to take some notice of this application. They could learn a thing or two.