I use RescueTime to monitor how much time I spend developing. The data below isn’t entirely accurate as it’s only logging data from my main computer. I also use a laptop and my phone but its a good representation.
So out of a total recorded time of 695 hours:
Software Development ~ 65% of my time is spent on coding and testing.
Design ~ 18% This will mainly be in the area of graphics via photoshop.
Communication ~ 9% This includes Slack, Discord, emails etc.
Utilities ~ 9% Not sure exactly what this covers but probably means other development-related tools.
695 hours is about 13 hours a week. If I include the time not captured in this data it’s likely to be around 16 – 20 hours. This is in addition to my full-time job.