It really does depend on the size of the apps. As each application will vary and the stuff you do on it will also factor how many apps you may install. The average customer can hold 40+ apps.
If you only use your iPad for internet I wouldn't. But if you use it for apps yes, then you can sync your Apple ID.
Yes, you can use app which could help you in tracking messages over your iPad Air 2 now head out over the iTunes and see if you can find one out which works for you !
No, the IPad Air is thinner and lighter than the iPad 4
As of May 6, 2014, there is no current plans for an iPad Air Mini. Apple has however announced the iPad Air 2 coming out in the upcoming months.
ipad air is better than a playstation 4 whith millions of reasons to know some of them visit apple.com and search for ipad air and you will know why you should get an ipad air
The iPad Air is much slimmer and weighs less than the previous iPads. Many people do prefer the iPad Air over previous models.
Yes, we can use the external storage device in the iPad air.
One of the newest software updates for iPad includes air print.
It depends on how much you need to store and also if you travel a lot get the 3G one, but as far as GB, it depends on how much music/books/videos/apps you want to store
you can sync ipad air to dropbox then sync dropbox to Nexus 7
Yes. Bluetooth capability is included with all versions of iPad 4.
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