Enter your idea

I normally add a copy(email download or photo) of any bill when loading it to Xero. It is easy to do with emailed bills but lets say a coffee bill, can take a lot of time. (Taking a photo, email it, download it and add it)

It would have been nice taking a photo of the bill through the Xero app to load it as a bill, from your phone.
If a owner operator buy something it would make it easier just going into the app, go into bills, take photo and load it there and then... done. (I am sure it should be possible that it could take all relevant information automatically from the bill into Xero, only leaving an "Approve" option to finalize the loading of the bill or "Save" as draft, if changes needs to be done and you want to do it later. (nothing to file, nothing to remember to do at a later stage)
This seams to be such a logic solution that I am sure there is software already available that I am just not aware of, but then again this will be at extra charges.... :-)