Mobile Cryptopia - not the same application as was released 5 month ago, this is a new application, just released initial version.

The reason to choose Cryptopia - although all known issues, Cryptopia still supports trading of significant number of altcoins and still popular as crypto exchange for less known altcoins.
Just for instance - Binance great exchange with huge volumes, but it has 357 active trading pairs for today. Cryptopia has 595 active trading pairs. So use-case exist.
Anyway, it already created and published! Others on the way.

Current version of the app can be installed on iOS 9.1 and up.