That sentence seems very inaccurate. Albert Vaca's blog has a post from October 2013 that says Publish and maintain the iOS port that Yang Qiao begun this GSOC (any iPhone user around?) but no one has updated kdeconnect-ios source code on https://cgit.kde.org/ since 2014. And there's no evidence of a Blackberry port. I know little about this project but I rewrote big chunks of the KDEConnect page to be, I hope, more accurate.