Pro Maestro 4+

Connect to the osaki Bluetooth with your phone and then connect with the app. It’s in Chinese until you are connected then the app seems to work fine.

It worked for a while. Now it continually thinks the chair is not turned on when you try to select anything on the menu. When connecting the phone, it does not filter the Bluetooth device list and shows every BT device it sees. When screen is in dark mode,the list of BT devices cannot be read. Once the screen sleeps BT will be disconnected, so to change settings after calibration you must reconnect BT. And it’s still a better UI than the built in controller.

Language setting is ignored. All text is in Chinese. No longer connects to chair. They are still selling these new through costco but manufacturer has clearly abandoned the app. Other apps by the company seem similarly abandoned. Raises questions about product quality and support.