I'm sure that sky safari actually runs equally well on either iOS or the android platform. Personally I'm an Android fanboy. I just like the much higher customizability and multitasking functionality of android over apple. I know on most any android device you can simply set the lock screen to "none" in the settings before observing so the screen can be turned off to conserve battery. With this it isn't an issue of disrupting night vision during observations. When the screen times out or you turn it off then turn it back on it opens right to the app you had open, which would be SS in night mode in this specific case.
If you're already invested the Apple ecosystem then I'd suggest staying with apple devices other wise you'll have to purchase apps at a double rate.. one for your apple device and then one for the android device. Plus you'd have to consider the learning curve between the 2 operating systems. there isn't as much difference between the 2 OS's as there used to be but still enough that it can be frustrating when you're trying to do something on each to make each other match or do something similarly. I know i've had rounds trying to do something on daughters Iphone that only takes a few clicks in android that you have to dig through the iOS settings menu to get to. Or switch your phone to an android as well if you go with the android tablet. The way these ecosystem driven devices are designed are to function in conjunction with other related devices you use across your life. I have an android phone, tablet, google tv box and I use Chrome browser. All my media, bookmarks, browsing habits/history, syncs across all the devices. plus it all happens wirelessly no attached cabled syncing.
What ever tablet you go with make sure it fits all your needs. Do you plan on using this device for other than astro use as well? Take into consideration size, most people think bigger is better but I tried using my 10" tablet for astro field use and found it cumbersome as It was really a 2 hand hold device. 7" is nice but the sweet spot is in the 8-9" range. If you do go with a bigger device have a strategy for attaching to a stem or stand so you don't have to hold it all the time.
Edited by Sean Wood, 15 August 2014 - 04:41 PM.