It's awesome to see that someone already shared it! Thank you. :D

Disclaimer: I'm the author of the book. I'm happy to answer any question.

It puzzles me why Firefox can't support Antialias fonts and the same video types supported by Chrome and Safari. Will find a fix. Thanks for letting me know.

I'd say there is zero learning curve. So much easier to get started for anyone new. My favorite thing about Sketch is the ability to use Pages and Artboards + Symbols for multiple screens design. That's the way I prototype nowadays; focusing on interactions and flows rather than static single screens and branding/image editing.

I can't imagine anyone using PS to do flows.

I actually use Illustrator to handle the different artboards and do my flows and wireframes.

My team member uses Sketch for precision coordinates - our developers have Sketch too so they can just load it up and get coordinates for each slice.

Photoshop has been too hard to use for anyone outside the design community to want to learn. It's the new MS word. The export for 1x, 1.5x, 2x, etc. could be useful for making assets for Android.

Sketch is by far the best UI design application out there.

James, this book wouldn't be possible without you. You taught me virtually everything I know about Xcode!

David, you're doing great yourself. I look forward to what you have in store for us. Thanks for dropping a line!

Thanks, I think you will like the final content when it's ready! :)

Hmm, popcorn is a single chatroom within a location. Ripple is multiple chatrooms within a location, but based on a topic. There is no signup. That actually creates some really interesting use cases. Hopefully, you'll decide to try it out! :)

Thank you, hopefully our little hackathon experience will inspire others to build their own Apps too! :D