"The fastest" and "the easiest" are so over-used that they've become meaningless. Especially considering that the alternative solution -- just emailing something to yourself or to someone else -- takes about 10 - 15 seconds. Cutting that down to, say, 8 seconds, is counter-acted by the time it takes to download/open the app (is it an app? I don't know), ask others to download it, etc.
What pain point is this solving? Whatever it is, make that your main message. That's the fastest and easiest way to your the point across.