Dcovery - Pick image
This is my favorite part of the Place Finder install: the pairing process.
The user is presented with a (big) glyph in his desktop browser, and has to tap the matching one on his device to confirm the pairing.
Having users pair their browser with their device in advance enables us to generate a custom bookmarklet on the fly, so they will never have to enter any login information again (even if they clear their browser's cache/cookies).