Developers cannot be reached, there are a lot of angry reviews in the app stores, which they most likely have not seen.
The brush is good, but if you need the application to work, then it is better to choose something else.
Got pros:
It cleans well, different modes, lies in the hand, the nozzles sit firmly, it looks nice.
Got cons:
The developers scored on the application. The official one does not work, as it is not supported by the current OS. Without application, the brush works at half strenSee full review