For quick and easy access to a camera, you can easily reprogram your iPhone so that when you double-click the Home Button, it will open the Apple Camera app.

Open Settings > General. Scroll down about to just below the bottom of the screen to Home. From there, you can change your Home Button settings to Camera. Better yet, even if you change this setting, one-click still takes you to your home screen.

If you’re like me and you have third-party camera apps that you’d rather use, you won’t be able to assign the Home Button to automatically open one. However, in a pinch, the Apple Camera will do and having quick access to it is better than missing your shot.