I talk to my RC Racing friends mostly on FB groups or messenger chat groups. And some on discord aswell. Those are just mainly chat apps to talk to each other / help each other. We just screen shot our results for our friends off of liverc, rcscoring pro or whatever that track uses. I personally use RC Garage to keep in check of race stats for my car, setup, and how many packs I did, and I use So Dialed to keep in check of setups, and my Hobbywing V2 app for tuning my esc. Thats all I got on my phone. Not really a app out there like you mentioned unless its that new app I shared yesterday but it seems like it doesn't want to work. Not to mention, it just came out the other day so could be buggy and from the screen shots its mostly