Hey all! Author of IHaskell and Kronos here. Feel free to ask any questions :)
Sadly Kronos is outdated now, because it is based on IPython 2. IHaskell now supports IPython 3 / Jupyter only, as of the release that I'm going to try to put on Hackage today. I strongly recommend installing from Github master now - we have two easy to read installation scripts for Linux and Mac (so no need to trust them blindly, you can just read their source to see what they do).
Someday when I have the time Kronos will get an overhaul. The Python version will become free - it makes no money, unsurprisingly - and you will be able to download kernels from the app, perhaps including Julia and others, instead of installing separate apps.