Two more things:
14. Make Yappari to remember last used location for multimedia files (picked from "Sent Multimedia"), instead of hardcoded system default ones: browsing from internal memory DCIM folder over and over again to some custom one on memory card is a PITA on longer use.
15. In chat view each and every single sent message should have the same color, regardless is it pure text message or multimedia message and that color must be different than received messages color. Right now it looks like that:

Message "A" (sent) have the same color as message "B" (received) - black, but it should be gray as one above it. So received messages are good - always black, but send are wrong: they are both gray (text) and black (multimedia).