The average user generates around $10-15 in roundups per week, although you might save more or less depending on how frequently you use your debit and credit cards.
If you want to reach your fundraising goal faster, you can:
Boost your donation goal with a one-time deposit or weekly recurring deposits;
Multiply your roundups using the Multiplier feature in Funding Rules and;
Earn $10 for every friend you successfully refer to the app.