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BlackBerry's voice control system on the BlackBerry 10 OS is the new kid on this block.
Like Siri it can be used for things like sending text messages, placing calls or scheduling a meeting or reminder. It can also be used to take notes or to dictate other text.
Word recognition on the BlackBerry system is actually pretty accurate — most of the time it seems to understand what is being said if you speak clearly — but it can't understand natural language in quite the same way as Siri and Now. For example, if you say 'take a picture', the handset responds with 'do you want to search the internet for take a picture?' However, say 'open camera' and it can do that.
Like Siri, the BlackBerry system asks for confirmation of commands. I asked it to send an email to Ben Woods and it responded by asking which Ben Woods email address in the address book I would like to send it to, all achievable through voice commands.
It also has quite a granular level of control of the information being entered or edited, for example, when scheduling an appointment or writing an email it will allow you to select and edit each part of the message (time, title – for an appointment, or things like subject line, body, recipients for an email) without needing to touch the handset.
It did occasionally find it difficult to recognise confusable commands. Such as, instructing it to set a reminder that it was Ben Woods' birthday tomorrow ended up in a calendar entry saying 'Ben would birthday'. It's only a minor point, but worth keeping an eye on if you're sending messages to people that have similar sounding names.
Asking the BlackBerry Z10 where the nearest Nandos is resulted in the phone offering to search the web for the closest branch.
Where the BlackBerry falls hardest is the lack of a partnership with a service like Wolfram Alpha, as offered by Siri. Asking it any kind of mathematical addition or division simply resulted in it offering to search the web, despite understanding every word, rather than displaying the result.
However, the voice commands are pretty powerful overall. You can open any app on the phone or search for any phrase, contact, word or anything else all via search and it will understand what you are saying quite a lot of the time. And if social networking is your thing, you can update your status on Facebook or post a Tweet without using your hands.