I have found some great apps to help pay down my student loans and they send the money direct to the loan co. for you. Some of the apps also allow you to list credit card debt and auto loans too. They each charge a small processing fee each month but it is worth it. I have an iPhone so I'm not sure if these apps are also offered on the Android platform but their website will tell you.
Chipper - newest app to the market offers ways to make extra payments besides the spare change round-ups. https://www.chipper.app/
Qoins - round-ups for spare change and smart savings every few days for a few extra dollars. https://qoins.app/
Snowball - rounds-up for spare change and they send out a payment twice a month. https://savethesnowball.com/
Changed - rounds-ups of spare change but you need to wait until you have $100 accumulated in the app which could take a few months and interest accrues daily so this app doesn't interest me (no pun intended). https://www.gochanged.com/
Since I use a separate bank for my bills and a separate bank for my spending, I have 2 of these apps rounding up spare change from my bills account and 1 app rounding up spare change from my spending account.
I truly hope you check these apps out and they help you pay off your debt faster!