This online tool allows you to get matches info for the social app 'Once'.
You can install the Chromium extension from the extension folder and then click
on it or if you want to host the index.php yourself do so but remember to update
the form URL in extension/popup.html.
When this tool was released in 2016 it was properly retrieving data from their API, I've just checked in February 2017 and it doesn't seem to be working as well as before.
Obviously this tool have no affialiation with the company behind 'Once'.