I'm the target market for this app, as I lose hundreds of dollars a month in unclaimed expenses.
This is completely useless for me, it was as an app and even more so as a slack bot - I work in the sales department of a large co (as will the most profitable segment for this kind of app) and here's the things you would need for anyone at my workplace to use it:
- Concur integration of some kind, otherwise your "beautiful" PDF Is useless, because my expense department will not pay anything without the proper cover sheet.
- As you said, you want to give me some kind of email address* that I can forward an uber, air or hotel booking to and it will automagically add it to my expense report.
- Slack-only rules out the entire big co space as it doesn't run behind corporate firewall, so it's not allowed. If you want to integrate with a chat solution, go for Chatter, Yammer or Lync... or better yet, use email.
* Why email? because it's standard, and it's the way sales people are used to send tickets to salesforce.