My apps keeps closing suddenly iPhone 5

Reset your phone, hold the home and off button down until the apple symbol comes up, you wont lose anything.

Maybe 15 sec, untill you see the apple logo

When the apple symbol comes up let go.

I have the same problem, but i have an iPhone 4

My 4 is doing the same thing & I have already tried backing it up & turning it off & it still won't fix the problem. Now what?

Never resolved

I have IPhone 5s with IOS 7.1.1

and always have the same probleme especially with viber

always closed alone and suddenly

I am lost......