You have to use an additional app, such as Pushbullet, in order to sync notifications to your Mac. It'd be nice if Textra had a companion Mac OS X and Chrome app that backed up your sms / mms messages on your personal Dropbox, iCloud, etc.
The killer feature of invi is the ability to consume media in the app. For example if someone sends you a link to a Youtube video invi automatically turns it into a playable widget. Not only can you view the media in the app, but you can also discuss the videos, photos etc while they are playing.