The Inbox and Outbox names aren't particularly intuitive. I'd like the ability to either re-name these or provide a hint to users explaining their purpose.
Example: I have a survey for recording trash sites which require clean-up. People will call to report sites, then a field worker goes out to clean up and uses the Inbox to re-open existing surveys and mark that the work is complete. In this case, I'd like to re-name the Inbox (or at least provide a hint!) to instead say "Open or In-Progress Sites", because the word Inbox does not communicate this.
The Outbox isn't as unclear but I'd still rename it as "Unsent Surveys" to better communicate that these need to be sent once internet is available.