Turn off screen with gesture/app/button?

Does anyone know any kind of workaround to turn off the display, without pressing the power button?
I never had to on other devices (because I used a holster), but now on the Passport the power button is not easily reachable (and no holster with magnetic back is available right now) and this is personally the most annoying part about the phone right now, to reach for the power button!

Does anyone know of anything that could help in this situation?
Thanks guys and ladies!

Posted via CB10

turn it upside down ?

posted form somewhere 49 south 29 east things u can do with a passport imagine