Do I have to save monthly or can I deposit a larger amount and manage it?
You choose how to use the tool for yourself. Even though most choose to save monthly, many choose to deposit an amount once and then manage it. It is then common to choose to adjust the portfolio twice a year instead of once a year. To do so, go to the portfolio you want to adjust and click "More Features" and proceed by changing the settings under the "Adjust Portfolio - to keep it up to date".