The default photos app in iOS is organized by date of capture. The ability exists to create custom albums, but the images are sorted by the time that you added the image to the album. I am looking for an app that allows me to add images to an album, and rearrange them as desired regardless of when the image was captured or when I added the image to the album.
Ultimately what I am trying to accomplish is before/after shots of DIY projects that may include images captured over a long duration. Then I can flip between before/after images easily.
I am using iOS 8.4 on an iPhone 6+.