iPhone 6
About two hours solid, sat in front of Inkscape, holding a phone in front of my face. Add on an extra hour if you’re willing to count the time taken hitting the undo button :P
Some user interface elements are deliberately changed, and the font is different (mainly because I prefer this one) but, asides from them, this is probably one of my most photorealistic works ever. A few minor annoyances - especially the shadow under the home button rendering jagged (it doesn’t look like that in Inkscape) - but I’ll definitely be using this in a future Reboot comic page.