for my unit at least, you can actually change the fan speed in the root login actually. after you set up the device with the app, type in the IP in a web browser, [default password & username is root/root] and it's in the "configuration" tab towards the bottom of the screen.

i haven't used the app since the first day and all i used it for was to set the 'color' mode which can't be changed without the app.