Microsoft Hardware now offers a Bluetooth keyboard that works with all mobile platforms
Microsoft’s Universal Keyboard has an Android home button, no Windows logo in sight | Android Authority
From the horse’s mouth
Universal Mobile Keyboard Product Page
Microsoft have designed a Bluetooth keyboard that is intended for use with smartphones and tablets that run on the three main mobile platforms: Android, iOS and Windows 8. This is to cater for a reality where people may operate different computer devices on different platforms.
Microsoft have achieved a universal layout with platform-specific keys for Android and iOS, like the Command (snowflake) key that the Apple platforms need. The Windows or Android modes could work with devices like games consoles or Smart TVs that implement Bluetooth Human Interface Device Profile in the context of a full keyboard for text entry. What could this mean for using your smart TV’s social-network or content-search functionality without “hunt-and-peck” operation.
But you can select between the different operating systems and keyboard layouts using a three-position hardware switch. As well, the keyboard remembers Bluetooth pairings with 3 devices of the different platforms.There is even a rest for your tablet or smartphone so you can see what you are typing and this works as a lid for the keyboard.
Of course, it can run from its own battery for 6 months but can allow you to quickly charge the keyboard to gain 8 hours extra runtime.
But most of us who use keyboards with tablets typically head for those keyboards that are integrated in a case for the tablet and Microsoft could do better to offer this as a case for most 10” tablets.