Given the state of Linux application naming, we're lucky it's not called GKCellP, so we'd have to find it via 'apt search kdeconnect' every time because we can't remember the name. (I'm looking at you, GKrellM. You too, Liferea. )
Konnect is KDEPIM's app bundler ui, that allows using kmail, korganizer and such inside single window.