Youlean Loudness Meter was and currently is developed by a single developer: Julijan Nikolic
The first version was released on November 30, 2016, and development is still going on.
The development was started for the KVR Developer Challenge 2016 competition in which Youlean Loudness Meter got the top votes and first place.
The winning product was then presented at NAMM 2017 in Los Angeles, USA.
Since then, Youlean Loudness Meter has had a lot of new features added.