Funny I built this same thing (ours was SMS only) with someone I met on HN a decade ago and we even used the same landing page technique you have here... Swappi

Funny I built this same thing (ours was SMS only) with someone I met on HN a decade ago and we even used the same landing page technique you have here... Swapping out the key word. I hope you have better luck marketing it that we did - you're off to a good start getting promoted on HN!