How often do you drain your air compressor?

How often do you drain your air compressor?

I installed a 1/4 turn ball valve at the drain to make draining easier, and I drain the tank at the end of every day and leave it open until next use. Lots of different opinions here, but that's what I've always been taught as best practice. Those automatic drains are a neat idea, though.

Kendog 170 said
No one's mentioned an air dryer. My work threw out a perfectly good 115-volt air dryer. Now I just need a shop again :( I know it just treats the air after the tank. I like the drain on the timer idea though.
Ingersoll Rand D25IN, Non-Cycling Refrigerated Air Dryer, 15 CFM, 1-Phase 115V

I'm getting ready to install that exact unit. Is there any reason it can't be installed between the compressor and tank?