Lines!!!!! It's from the Touring Plans people (sign up with Touring Plans, get the amazing Lines app) For each ride it gives you the posted wait time, expected wait time (which were generally spot-on) and a blurb about whether to ride now or wait and what will be happening to wait times later in the day.
You can use their touring plans or make your own customized ones. You can check off items as you go if you like.