Thanks for the reply. That is an interesting approach to do PNG assets in pixels and redlines in points. Have you run into any issues using that system? Another question I have is that while 1x assets are normally created at a standard 72 dpi, the original iPhone is actually at 163 dpi. Have you ever noticed that to be an issue?

Thanks for the reply. We are trying to figure out the best process when we initially hand off the designs so that our developers have something to start with. How do you normally start that discussion?

Thanks for the reply. Zepplin does look like a really great tool.