Been doing a bit of research into different investment apps and comparisons and this popped up - tiger brokers have one of the lowest brokerage fees, the link uploaded will give you the following deals:

-Zero transaction fees (e.g. brokerage fees) four times for US and ASX shares every month, for life.

-Zero currency exchange fees for the first NZ$2,000 of currency exchanged every month, for life (NZD to/from USD and AUD)

-A NZ$30 cash bonus with any new account opening, and an extra NZ$50 cash bonus in your account with a cumulative net deposit of at least NZ$2,000 within seven days of the first deposit.