I apologize, I wish to highlight MAILWISE, it does not use a cloud has a great display thread.
Yes, MAILWISE has a kind of message threading. But I'm missing swiping from message to message and that really great "swipe'n fire" feature in AquaMail's message list: swipe a message left or right to the desired action icon and just lift your finger to trigger the action... no additional touch necessary
And I'm missing lots of other features there:
- customizable colors for account name,
- customizable ackground colors in message list for read/unread /starred messages
- shrink attached large images when sending
-...