Expense-Tracking App that integrates with Salesforce

Hello,

We are in the process of finding an expense-tracking app for our participants/volunteers to use while traveling on our international projects.

We’d like it to be able to do the following:

1. Take pictures of receipts and credit card statement
2. Reconcile receipts with credit card statement
3. Create an Excel report
   1. Convert foreign currency to USD
   2. Auto-populate date, vendor name, location, and expense category (i.e. food, hotel, transportation, etc.)
4. Allow for approval flow options
5. Integrate with Sage and Salesforce with upload capabilities. 

I know there are probably many apps that can do these things, but we are trying to narrow it down to a few that we can investigate more deeply.

Do you have any recommendations?

Thank you!