Looks nice.

But on first sight I did not recognize  the letter "Z" in it.
It wasn't until I saw the name "Zeus" that I realized it.

Thought it is some kind of a slash "/" surrounded by some other symbols and connected it as something related to coding.

I guess coding topic contributed to this logo. :)

For my taste it has to be a little more clear that it is a Z.

But yeah, just my little opinion on this. 

In the end it doesn't change the fact that your app works great for me.

Keep up your awesome work :)