AutoSync by Time or when Charging?

[Hyposprayer]

So I think it's particularly annoying to have to remember to turn on my sync feature just before bed and I'd like to be able to have my phone turn on sync automatically when I put it in its dock and then turn off sync when I unplug it. I would also settle for an app that turns sync on only at specified times.

I've so far seen one app that does what I'm asking, but it's something you have to pay for. I'd really like it if someone knows of something like this that I could use for free!