Can anyone recommend an accounts payable app?

Hi Pickle, thanks for reaching out about 3rd party apps. You can have a look here for accounts payable apps that integrate with QuickBooks. We also welcome other users to add apps they would recommend on this thread.

@Pickle 

You can explore Wise Business with a simple billing management feature to integrate with QBO.

https://wise.prf.hn/l/64dl92k