Coinbase

Buy and sell major cryptocurrencies on one of the world’s most renowned cryptocurrency exchanges. Founded in the USA, in 2013 – you can buy Bitcoin using Australian dollars, NZD and USD. The only supported transfer method is credit card. Only individuals can buy Bitcoin, SMSFs, businesses and trusts are not supported. You can easily purchase Bitcoin using their mobile app.
Coinjar

Founded in 2013 in Melbourne, Australia: CoinJar offers a simple way to buy, sell or trade Bitcoin in Australian dollars. You can buy Bitcoin using Australian dollars, NZD and USD. Supported transfer methods include PayID, BPAY and Blueshyft. Only individuals can buy Bitcoin, SMSFs, businesses and trusts are not supported. You can easily purchase Bitcoin using their mobile app. Register with Coinjar.
Gemini

The Gemini mobile app is the safe, trusted way to build your crypto portfolio. Buying, storing, and selling crypto has never been easier. Available for both Android and Apple iOS. Deposit $100 or more using the link below, and you will receive a bonus $10.
Amber

Australia’s first all-in-one digital currency exchange, wallet and micro-investment app, Amber is dedicated to helping everyone hold some Bitcoin. One cool option on Amber is the ability to make small regular investments. Choose the amount you wish to purchase (i.e. $20) and how often (weekly, monthly, etc), and they take care of the rest.
Download on the GooglePlay Store | Download on Apple App Store