In July 2022 I’m having no trouble controlling my L20 with this app. Obviously, it is wonderful to be able to check the mix from the audience position. It’s been a while since the app has been updated, so I’m hoping that, in addition to an iPhone version, there are some other features on the way. I would especially like some kind of RTA functionality with an EQ with many more bands than are currently available, so that I can “ring out” mics/monitors before a show, or better yet build in some tweakable feedback removal. This is a hardware/software system with absolutely massive potential. I have recommended and demonstrated it to many friends and I hope that Zoom continue to develop it for many years!