Character counter when composing SMS
Since SMS length is limited, long messages need to be split into several ones, which in turn makes the message cost more.
Usually phones show a character counter and indicate how many SMS will it take to send a message, so users are aware of increased cost and can edit their messages to still fit into smaller amount of messages. It would be nice to have something like that in Chatty as well.
To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information