Hi guys!
I have created an iOS app for trading on Cryptopia.
If you guys want to check it out, it is here:
https://github.com/florinusc/CryptopiaTrader
Apple does not approve it for sale on the App store because it trades currency that is not approved for use in their apps (that was their formal reason).
In any case it is open-source so you can also check the project files before installing.
If someone wants an .ipa file that they can directly install on their device through iTunes send me a message here and I'll email it to you.
Hope it helps. Cheers!