Gone are the days of a phone revolving around voice communication. These days, a mobile device is a powerful personal computer -- and with the right set of tools, it can be an invaluable productivity machine.
So how do you transform your Android device from interesting gadget to indispensable assistant? We've got you covered. These 18 apps are among the best functionality-expanding productivity tools available for Android today. Put them on your Android smartphone or tablet, and get ready to watch your productivity soar.
(Note that this list does not include apps already bundled in by default with the Android operating system, such as the excellent Android Voice Search and Google Now utilities.)