here’s a simple wrapper page that displays selected fields from the get observations endpoint in a human-friendly tabular format:
page: https://jumear.github.io/stirfry/iNatAPIv1_observations.html
code: https://github.com/jumear/stirfry/blob/gh-pages/iNatAPIv1_observations.html
example usage: https://jumear.github.io/stirfry/iNatAPIv1_observations.html?user_id=fero&per_page=200.
this doesn’t include as much information as the other thing, and you’ll have to specify parameters directly in the URL, but i think it should suffice for general use. i didn’t think to try to create this kind of page before, since it’s very close to the existing List View in the Explore screen, but i suppose this has a few extra fields, and anyone who wants to add additional stuff to it is welcome to modify the code as they wish (or suggest fields to add).