You can remap your android devices side key, which is usually a power key, simply set this app, to launch when you double press side key, to perform actions like take photos, and launch gallery app, just by pressing one of 3 buttons, and more available, in options menu, also if you press volume up key 2 times, it will launch camera, and once to launch android default, your device assistant app to speak to phone and do actions, features, like torch on off, or direct access to app, messaging by options menu, with more available in options menu. Easy to use makes life easier, even use as a normal app. Don't need to use side key, that's what it's designed for, if no side key, or special functions on power key, then use as normal app.
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