No idea about steemauto as this was the first one I found and it works as advertised. You set the percentage, when you want the vote to be cast, and how many times per day an author can get a vote (I set at 1 on everyone).

I'm easy as I post 2-4 times a week so I'll never drain your voting power. This week I might have 5 posts if I can find the time as there are a few topics I've wanted to post about. But if that happens it will be an oddity, not the norm.