In my April photography workshops, several students “How do you keep track of small sets of similar photos?” to which I replied “Stacks.” Many hadn't heard of this handy organizational feature in Lightroom (and yes, Aperture, too).
I use the Library Filter in Lightroom to sift through and search for my photos. I use it a lot. Smart Collections, too. There is a behavior in Lightroom that drives me batty and it lands me on the black “No Photo Selected” screen.
There was an issue in Mylio, introduce in iOS 9.3, where portrait (vertical) oriented photos shot on an iPhone showed up distorted in Mylio for iOS. The fix is in, but you have to do something tricky to get your images as they should be.