Hands-Free Control has been around for a while now, but with the recent jailbreak of the iPhone 4S, it just got a lot more interesting. Hands-Free Control only does one thing: It continuously listens until it hears the keyword (standard is “Siri”, but you can change it to another word). Once it recognizes the keyword, Siri will show up and you can use it as usual. This tweak is really great if you want to use Siri in your car and don’t want to hold down the home button for 2 seconds.
A lot of people are concerned about battery life because continuous listening obviously uses CPU power. The developers of Hands-Free Control did some testing, and these are the results:
We have performed numerous tests to make Hands-Free Control™ as lightweight as possible. Continually listening as a background service it consumes less than 1% processor use. Upon keyword recognition it jumps up to 15-25% for about a second. Compare this to turning on and unlocking your iPhone, which consumes about 25-35% processor use for about two seconds and it is actually more battery efficient to use Hands-Free Control™ to make a phone call than trying to do it manually.
Projected battery life times have been anywhere from 10-20 hours on an iPhone 4 running Hands-Free Control™ non-stop. This should allow for a full day’s use out of your phone without running out of battery. We are still working to make Hands-Free Control™ as efficient as possible and look for even better battery performance in the future.
Hands-Free Control works on the iPhone 4S or any other iDevice with Spire installed. If you don’t have Siri you can also use it to start Voice Commands.
Hands-Free Control is available in Cydia for 2.99$.
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