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This is my favorite office suite for Android, as it works with most popular cloud storage services. The word processor, spreadsheet, presentation, and PDF apps integrated in the suite are very good.
It is expensive for an Android app, but has proven to be well worth the price.
Android has a big advantage over iOS as third party keyboard apps can be installed. SwiftKey is one of the best on Android and the first app I install on every device. In addition to being a useful keyboard that supports both typing and spelling words by swiping in one continuous movement, SwiftKey employs predictive text entry that gets better the more you use it.
The predictive text works as follows: start typing a word and after just a letter or two SwiftKey figures out what word you want and presents it above the keyboard. This process is so accurate it is uncanny. Every Android device should have SwiftKey installed.
Tunein Radio Pro
Tablets are good for listening to music in the background while doing other things, and that can mean streaming radio programs with TuneIn Radio Pro. This app handles stations from all over the world in every music genre imaginable. There is a simple preset system for saving favorite channels, and a local function that displays all radio stations in your particular area.
The Pro version allows voice control for listening to music hands-free.