There’s been a lot of hype surrounding the vector design tool known as Sketch, which is made exclusively for Mac and leverages Apple frameworks and hardware.  It’s a lean and focused product, while Photoshop is a behemoth with tons of legacy code and feature bloat.  Don’t get me wrong…I’ve been using Photoshop since the early 90’s – I’m comfortable with it and it’s a powerful tool who’s depths I will probably never fully realize.  But, Sketch is pretty intriguing…even Teehan Lax has started shifting towards it.  So if you’re not too keen on paying a monthly fee forever more in order to use Photoshop, at $50 Sketch is a steal…and definitely worth checking out the free trial.  Here’s an article comparing Sketch 3 to Photoshop.