Launch app(s) with your headphones in iPhone

Now you can use your headphones to launch any app in your iPhone whenever you connect or disconnect it. This can be done with the jailbreak app; Activator which it offers this new feature in the new updates. Below is the steps how to do it or you can watch the video below for clearer idea:

Install/update Activator in Cydia. You can install it by searching for it and tapping the Install button or update it through Cydia’s Changes tab.
Open up your device’s Settings app and tap Activator.
Tap anywhere, unless you want to restrict the action to your home screen, an app, or somewhere else.
Scroll all the way down to the bottom and you’ll find headphone actions. You can tap Connect, Disconnect, or one of the actions for the headphone’s remote.
Choose what you want to happen. You can select an app to launch or various other actions.