[abbott]

The source files are exclusively Sketch, and Photoshop/PSD is absent. The UI design community has been shifting for more than a year, Apple started releasing UI templates in Sketch in addition to Photoshop in 2015 — Google even earlier.

Illustrator is still highly relevant for its strength, vector based work, while Sketch has surpassed Photoshop for UI.

The momentum is only increasing, even with bugs and issues found in Sketch. It's obvious the interface design community desires better tools. I wonder if Adobe Comet stands a chance with disruption we're seeing?

[wlesieutre]

Part of Sketch's draw (in my opinion anyway) is that you can buy it. $99 and done.

Alternatively, you could take that money and rent either Illustrator for 3 months or all of Creative Cloud for 2 months.

Even if I didn't like Sketch better, that would be tough to argue with.

[voltagex_]

OS X only. What a pity. Also, has anyone reverse-engineered the file format yet?

[zuck9]

It's actually SQLite.

[zuck9]

It's just XML IIRC.

[frozenport]

So is SVG! Hell even docx is just XML!

[tlrobinson]

It's a bit like saying "it's just ones and zeros".

[throwaway2343]

Not really. XML parsers are readily available for every mainstream programming language. DOCX is a public standard as well. Unlike "ones and zeros", XML's structure is transparent.

[castell]

Have you ever tried to parse DOCX/XMLX/PPTX anti-XML pattern? A XML-serialization of their old OLE based formats.

SVG, OpenDocument, ... are real XML based formats.

[adpirz]

It really is just a better experience through and through for mocking UI. Once you get the simple keyboard shortcuts down and a decent set of icons / graphics from sketchappresources.com, you can do a lot very quickly. I recently discovered that you can pair this with keynote to do some quick and effective UI animations.