ayi9 app for iPhone and iPad 4.0 ( 6880 ratings ) Utilities Developer: 汉民 杨 Free Current version: 2.40119, last update: 5 months ago First release : 07 May 2020 App size: 5.98 Mb Ayi9 wlink app monitors the industrial devices such as UPS, Regulator, Air conditioner, Elevator.