To learn the fundamentals of interface design, I am trying to replicate some better known app interfaces. The 'flatter' layout of many iOS7 applications makes it relatively straightforward. However the toughest part by far has been the icons.
Deconstructing other PSDs available online, I have been able to reproduce the icons in Photoshop. Most often they seem to use the shape tools (rounded rectangle, line tool etc.) to mimic the shape, then merge them using Layer > Combine Shapes.
This works well for mimicry, but I suspect it is not really suitable for creation. The problem with this method is that it's difficult to get the icons pixel perfect. Also if the icon shape is complex, it requires a silly number of shapes to create the overall effect.
I don't necessarily need a step-by-step guide or link to tutorials. Just a pointer in the direction of which tools / programs are best suited for this job. What's the jist of the workflow?
Many, many thanks in advance.