Try mquickdo. It let's you replace broken home/power buttons with a bar at the bottom of the screen that u can slide different ways to do different things( like lock your iPhone)
I love Mquickdo I purchased it...but i was wondering is there an app I can use to power down and power up my device my power button is broken any advice would help. Thank you.
oh; something like that. the only solution i can think of is using the sbsettings reboot tool. IT DOESNT ALWAYS WORK, but most of the time, reboots your iphone perfectly fine. I believe that docking your phone will also turn it on.