iOS device users can invoke Siri on demand with a simple button press or by muttering ‘Hey Siri’ under certain circumstances, and jailbreakers have even more options for calling upon their virtual assistant for help, such as Ryan Petrich’s Activator extension. But who said your options had to stop there?
With a free jailbreak tweak called SiriApp by iOS developer level3tjg, you can add a dedicated application icon to your Home screen for invoking Siri.