What's the best way to contact Foreceipt for support?

From the app, the best way is by "Send us a message" which can be accessed by More -> Feedback and Support.

From the web version, the best way is by "Contact Support" which can be accessed by FAQ & Support -> Contact Support.  Or simply visit  http://help.foreceipt.com/knowledgebase and then select "Contact Support".

Feedback and Knowledge Base