Managing millions of tasks, Todoist is an online task management app and todo list. It has Web, iPhone, Android, Chrome, Firefox, Outlook flavors (and more!).
Track approval tasks for unpaid bills nearing their due dates.
Get clear follow-up tasks for bills nearing payment, so your payables person knows which approvals to chase.
Show where supplier bills exceed recorded receipts.
Your bill reviewer sees the quantity gap or missing receipt ID on the task, so they can decide what to do with the supplier bill.