Right on their website is the official one:
https://www.universalorlando.com/
It has wait times, show times, hours, a guide me feature, maps...
Be warned though, it's a battery killer. If you have an iPhone, go through your settings and change the location services to not "always" be on (the default)- "when using" will save your battery some if you remember to close the app when you are not using the app.