Are screen protectors necessary for iPhone 6s? If so, recommendations?

If they were necessary, Apple would have put one in the box. Use of a screen protector is a personal choice.

they arent necessary - as the other replier wrote its a matter of taste - I have on for my 6s+ from a company called Daswise - you can finf them on amazon - tempered glass edge to edge protection - comes in eithe white or black to match phone

btw i have no financial interest in that company