To keep the same file format (itmz) format for read and write (this means you dont lose anything since you don't need to export to a different format)
To reach feature parity with iThoughtsX for the features I use on a daily basis
To provide a framework on top of which I can add all sorts of goodies that I wished iThoughtsX had included
To be able to run as a Web App on my phone or as a Native App on my desktop - Craig Scott originally intended to do an Android App, but it never happened... well now it can!
To be able to run on 'old' devices. (I have a perfectly good iPad2 which I'd like to be able to use as a recipe book in the kitchen)