Offline mode for iPhone that syncs changes as soon as a connection is made again. I regularly travel via plane & try to use this time to get to inbox zero, but archiving/deleting doesn't take effect once I reconnect.
Anonymous shared this idea
Anyone who lives in NYC needs this.
Chris Astall commented
I travel by tube in London and this is a feature that will stop me using airmail and revert to the stock app which has this feature