Sim racing demands a variety of skills and, at times, quite a bit of technical knowledge to perform at a competitive level. This not only includes the skills required to drive the car but specific knowledge of how car setup works that includes telemetry data, the intricacies of car suspension and aerodynamic setup, race strategy etc.
Sim racers tend to use a variety of apps to assist with this by simplifying some of these tasks so that they can focus more on driving. Delta, a small but powerful application from Coach Dave Academy was introduced last year with the promise of easing the pain of downloading and installing setups every time there's a new track to race on as well as a variety of other helpful tools.