I don't think it has to be flashy for the competition, as far as I know it doesn't even have to be particularly useful. I think the idea is to stimulate more interest amongst the community in developing new apps, so the more entries it gets the better I think.
Plus, as you say it's a complete rewrite of what is, in my opinion, a very useful application.
well i love gonvert but thats the only quirk i have with the app i usually forget you have to press fn to write the numbers as the gui of the phone usually knows where you have to enter a number
