Local multiplayer connection issue

I'm not sure if this is a bug, but my friend and I tried to connect to worlds on the pocket edition, but I don't show up on the local worlds list on his phone, and he doesn't show up on mine. We both are on the same wi-fi, and we both have our multiplayer setting on, but we can't connect. What do I do? I have an I pad mini on IOS 10 and my friend has a Iphone 7 on IOS 10