$8 white board with markers
4 - $1 timers
4 - 25¢ magnets
Low tech. Set the timers for the time between steps. First timer set at 45 second set at 15, etc. Might need to add a fifth timer, but four will work for 95% of what I brew. Hell, two timers will work for 85% of what I brew.
Now I can leave my phone plugged into the speakers and not worry about getting it wet.