First of all go to the home screen of kika app as shown like below...Next you will see settings button at the bottom right corner of screen...click on it..
Next you will see a list of settings and find Keyboard settings...
After opening an option of Auto capitalization will be seen at top....if you want to switch on then check the box or if you want off then uncheck the box placed infront of line...Here i am switching off the auto capitalization...
And finally this functionality is removed from keyboard....