Of course! Dave loves early paybacks!
You can pay Dave before your payback date with a partial or full payback by going to the "Me" tab and reviewing the "Payment" section.
Heads up! If you choose a partial payback, the remaining balance will still be automatically pulled from your account on your original payback date.
Once the full amount of your payback processes (1-3 business days), you're free to request another advance.