There’s a thread for that.
Re: it working: The older version, that supported iPhone, is gone. There is a newer version available, but not for iPhone.
Re being available, I see it on the french app store (linked higher up in that thread) and the gb app store. Didn’t check others.
EDITED: Clarified that for iPhone, there is no working app currently available from that developer. I should have read the thread title more carefully, sorry.