Zvv app versus SBB app

I never use the ZVV app since verry complicate and not really user friendly versus the CFF/SBB which allows us to travel in Switzerland using one app only (in particular if you need to buy several local tickets). Most of the time the Stoerungen are not reflected in the SBB app, why ? Which means that as user I must try to find the reason of the delay/problem somewhere on the internet/ ZVV website (most of the time not indicated). Using the geolocalisation you could reach all users on the Zurich Network sending a notification thought the SBB/ APP.