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There is no app. To turn it off, swipe up from the bottom of the screen and this will bring Control Center. You will see Flashlight button there. Tap it to turn it off.
Please let me know if that didn't work, so I will continue to help you
See this picture (click this link) --> http://www.imore.com/sites/imore.com/files/styles/larger/public/field/image/2015/06/how-to-flashlight-ios-screens-01.jpg?itok=urnCyWVe
Swipe up from the bottom of the screen and tap Flashlight button to turn it off. The button is on the left bottom in Control Center.
If that didn't work, then press and hold down the Power button and Home button at the same time until it shows the Apple logo. When you see the Apple logo, release the buttons and let it boot. This will fix it. Please let me know if that didn't work, so I will continue to help you
Hi there, Just checking. How is it going ? Were you able to turn it off ?