Binance for iPad
Currently (on June 26, 2019) there is an official beta version (1.6.0) of Binance app available for iPad. It can be downloaded from Binance website (https://www.binance.com/clientDownloads.html).
According to the active users, the app is working properly, however, there are some issues to be encountered by individual users from time to time. In case of problems with the app on your iPad, you can always use their online platform. It normally works properly and it is easy to use.
Essentially it is not much different from the app. You need a proper internet connection in either case. There are even some additional options available on their online platform, that are not implemented in their apps.