Mark Cuban is backing an app that’s trying to help people avoid overdraft fees

According to a report by CNN Money, the top big banks — Chase, Wells Fargo, and Bank of America — raked in over $5 billion in ATM and overdraft fees in 2016. In total, overdrafts cost customers $36 billion a year.

Overdraft fees hit close to home for Cuban.

“I got crushed by overdraft fees in my 20s,” Cuban said in a news release. “For anyone who wants to be successful, I always advise to cut down on useless expenses and save money. Overdraft fees are the definition of useless.”

Dave also allows users to borrow cash if their balance gets low. Users who have a negative seven-day balance can borrow up to $250 of their coming paycheck to cover expenses.

“We named the company Dave, because we wanted people to think of the app as a friend they can turn to when they’re in a financial bind,” Wilk told Business Insider.

Dave doesn’t make any money from the borrowing service aside from optional donations requested by the firm. It does, however, charge a $1 monthly fee to use the app, which is available to download now on iPhone and Android.