Hi all. Ive used previous versions of SkySafari, and I actually have both Plus and Pro. I use Pro on my 64 GB iPad, but stick a copy of Plus on my aging, space-constrained 16 GB iPhone 5S. Why? The main difference is app size. Pro has a gig of data that I mostly dont use, Plus is about 1/4 the size and has basically all the same functions. Sure, some of the pictures are a little fuzzier, and I dont see every star in the heart of the Orion Nebula ... but, honestly, 3 million stars, or whatever, is really more than enough :-) It controls my Celestron Evolution telescope too, over Wi-Fi. Cool. Altho if Im actually serious enough to take out the scope, Ill use Pro on the iPad. This is what I use for casual camping trips, or just whenever Im walking down the street with my girl, and she asks me, "Whats that star up there"? Gets me a lot of bonus points. If you know what Im saying.
OK, so whats new? In general, similar to version 4, but a lot of tweaks to look and feel. I like the little preview icons. I like the bigger Moon. It seems faster. The compass is WAY better now, which is especially useful for me cause thats what I use on the phone (as opposed to Pro on my iPad) most often. The iCloud sync makes it a lot easier to copy all my stuff between my iPhone and my iPad.
Also, I gotta give props to Bill in Tech Support. That guy answers every email I have, within minutes, and on weekends. Does he ever sleep? Insane. Anyhow - get it. Blows all competition out of water.