I created my original one right after they removed the 2 HE per day trick with Yata. However, I only had it shared there.
Mine takes into consideration your Total AP, Avg daily hours of sleep, daily cave runs, etc. And you can set priority to specific items.
I used to do that. Just run till I got everything. However I found that with drops and stuff I ended up with a lot of extra mats that I couldn't use. So I created the tool so that I wouldn't waste HEs and could know how many runs I needed as well as mats. Now I'm able to leisurely farm each day and average out my daily HE usage so that I end right on time with exactly what I need and as little excess/waste as I can.