Out of date
The app offers some smokes and flashes that you can do on the various maps. Sadly these smokes are out of date and most cant be used on maps like cobble, mirage, etc. The app also offers spray controls that you dont really need. You can just download a map to teach you. The only thing it might be good for (for new players) is the bomb plant timer. Not worth the buy, but can see the effort put in.
Gam3freak1199 about
CS:GO Companion - CSGO App, v1.4.5