Not even worth one star

This app is almost useless. Heres a list of problems it has:
You cant send or receive pictures or videos. It says you can, and it will look like youve sent it, but the other person will never receive the file.

If you type an emoji - even 1 - in a message the person who receives it will only see the message for a split second before it disappears.

Someone will be messaging you, but you will not receive those messages instantly but in a clump all at once 4 hours later. I sent a message at 10:20pm went to check messenger again at 12:20 - a bunch of messages time stamped from 8:57 and 9:57 showed up totally out of chronological order. When I logged onto messenger online all these messages were in the correct chronological order. Obviously the fault of the app.

Since you cant access yahoo messenger in safari on your iPhone Ill honestly say if you have to use this app it would be more efficient to carry around your laptop opened to the messenger website using your phone as a hot spot. The app is THAT bad.

Natbeans about Yahoo Messenger - Free chat