Each platform brings its’ advantages.
Mac, with its’ physical keyboard, bigger screen, and speed – is good for powerful text input, table manipulations, and page list management. iPad, with its’ slick touch screen – is great for import from the web, annotating, and dragging things around a page. iPhone is for fast access and catching notes on the run.
Thus, having notes across devices – syncing – might sound like making sense, to get most of each platform. As a matter of tradition (and technology), syncing commonly supposes clouds involved. But what if clouds are not allowed by corporate network politics or personal reasons?
Sync is still possible.