Sketch (for Macs) is my favorite software for creating application mock-ups/wireframes. It is incredibly user friendly and much easer to learn, in my opinion, than anything in the Adobe Suite. Its real strength is speed. It’s incredibly easy to add and manipulate a variety of shape vectors. In fact, Sketch was built with UI designers in mind and comes with tons of handy pre-sets, such as iPhone-sized artboards and Apple symbols. Another wonderful feature is a companion iPhone app, that allows you to preview your project in real-time on your iPhone. I would definitely recommend giving Sketch a try for this class! You can start with a free trial and also take advantage of special education pricing.