Activator allows you to launch apps or utilities on your jailbroken iPhone, iPad, or iPod touch with a quick swipe, tap, or button press. Swipe up from the bottom of your screen to quick compose a text, double tap the status bar to bring up SBSettings, or shake your device to take a screenshot. Setting up an Activator gesture takes just a few seconds and the possibilities are endless.
Activator can be found in your Settings app. If you're jailbroken, chances are you already have Activator installed whether you know it or not. Many utilities and applications in Cydia, the jailbreak app store, support it, and will install it as a pre-requisite to using the app. SBSettings, which lets you quickly toggle Wi-Fi, Bluetooth, and Airplane mode, among other things, is an example.
If you don't see an Activator your Settings app, you can install it for free via Cydia.
Your device will require you to re-spring (restart the Springboard, or Home screen app) after installation. Then you're good to go.
We typically recommend you allow Activator gestures to work from anywhere. However, you may not want this if you're setting a gesture that slides in from the bottom or top of the screen as it can conflict with the controls of some games. There's nothing like trying to slice in Fruit Ninja only to suddenly find yourself in a different app!
There are plenty of action options to choose from. For example, you can set up double tap on the status bar to bring up quick reply for Messages+.
Once you're done, you'll be able to perform any gesture you've specified, or call up any supported app or command on your iPhone, iPad, or iPod touch.
If you have any favorite or especially cool Activator gestures set ups you'd like to share, let us know in the iMore apps, hacks, and themes forum.
Additional jailbreak resources: