I agree that its crucial that Freetrade focus on lowest fees for ETFs. We talked about it little bit in this thread Gold holding in portfolio.
Fees around 0.03-0.07% is really low, so try to aim those ETFs if they are available. Most investors neglect the impact fees on long-terms investment.
The highter the fees are or the less annual yield you have per year the more you have to pay for the ETF. Check this table. Lets say an average annual yield for specific ETF is 5-8% per year then then a annual fee of 0.25% will cost you between 5.25-3.38 of YOUR ANNUAL YIELD. Then add how much you invest times years you keep them.
That said, according to Morningstar, the average ETF expense ratio in 2016 was 0.23%, compared with the average expense ratio of 0.73% for index mutual funds and 1.45% for actively managed mutual funds.