by Benjamin Weigang
*** If you rather want to use the volume buttons for changing tracks, search for "Change Spotify Track with Volume Buttons", there are versions for Android < 5 and Android >= 6. However, the Android 5 version does not work while the screen is off. ***
Double click power button (turn screen on and off) to skip a track. At flow start you can choose the maximum delay between the screen on and screen off events. You may have to experiment with this value and your actual clicking speed, as the time it takes to turn on the screen varies for different devices.