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What are the actual differences betwen Android and iOS in terms of user experience and function, What can you do on an Android phone that you can not do on an iPhone?
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Well the post below yours summarizes quite nicely. real access to file system and application separation from files makes Android more functional than IOS.
Think of Android phone as a portable usb flash drive, you can dump any file, any computer on the storage. Now when you use a file manager or email client app on your Android device, you can allow them access file system. Your files/apps are separated on Android. On ios you have to put files INSIDE an app, also not every app supports all kinds of files. On top of that, only that app can see those files. Thats' pretty bad if you accidentally delete your "app", guess what? your files are gone too.
Try putting some pdf files on "Adobe" reader on your iphone, the pdf files won't be read by ibooks or any other pdf file reader as a matter of fact. ANd if you delete Adobe reader, it will also delete your files.
This file system management is quite a big deal for me. It allows you to use all that "GB"s on your phone as you see fit.
Because of this file system behavior, you can have apps like "airdroid" that allows you to do nearly everything through a browser interface without wires. app like "mysms" allows you to send/receive messages without touching your phone. theres more examples.
In addition, you can change nearly everything on Android. All without rooting/jailbreaking/ without voiding warranty. its just a matter of installing a replacement app from play store. Do you have to customize? NO. Then of course for hardcore users, they can "root" and do some more stuffs.
hope it helps.