Sure, the blockmetry site has some issues. The menu is unusable on my mobile (android) and there are no screenshots or explanation of how it actually works (server/client side, self/cloud hosted?). There are some style choices that I don't agree with, like the binary background pattern.
But I like to assume good faith unless I have some solid evidence otherwise. Do you know for a fact that there is no product? If so, please share :)
It is, however, poor form to plug your competing product in a Show HN. It's a fine line between mentioning and plugging, but I think offering a discount falls on to the wrong side of the line.
All these things can be pointed out politely.