Siri can be a very useful feature on any of your iOS devices, but it would be pretty cool to be able to use your voice, rather than a Home Button, to launch Siri, being that she is a voice assistant. A new free jailbreak tweak dubbed OkSiri
by iOS developer Jay Zuerndorfer will make it so you can Activate Siri by the sound of your voice.
The tweak makes use of Activator, and will use two of your Activator actions – a new one that the tweak adds, and a pre-existing Activator action of your choice:
You will need to assign one of your pre-existing Activator actions to "OkSiri" so that you can enable or disable the tweak on demand. The "Heard Keyword" Activator action needs to be assigned to "Virtual Assistant" so that when you mention the keywords, Siri will be opened. Whenever you have OkSiri enabled, a microphone icon will appear in your Status Bar, as shown below:
At any time, you can invoke the Activator action that you assigned to OkSiri to disable the tweak when you don't need it, and this will help preserve your battery life since your device won't have to continue listening for your keywords.
The tweak seems to work rather well, and you can set your own keywords from the tweak's preferences pane in the Settings application:
With the tweak enabled, if you speak the words that you put into this preferences pane slowly and audibly, the tweak will invoke Siri and let you begin using the virtual assistant.
If you would like to give OkSiri a try, it's available for free right now in Cydia's BigBoss repository. The tweak requires an iOS 7 device that has Siri capability and also requires Activator.
iOS 7.0-7.0.6, Siri-enabled device, Activator
iPhone 5 running iOS 7.0.6